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I'm getting following error during release build:
error: Entitlements file "projectname.entitlements" was modified during the build, which is not supported. You can disable this error by setting 'CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION' to 'YES', however this may cause the built product's code signature or provisioning profile to contain incorrect entitlements.
I can't find CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION on Google or Apple documentation, any ideas where should I use it?
I fixed this with Product > Clean Build Folder.
Ran into the same issue. You can set CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION as a User-Defined setting in Build Setting.
In Xcode click on your project target and click Build Settings.
Click the "+" underneath Build Settings and then "Add User-Defined Setting"
Set CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION to YES for debug and release (or whatever schemes you like)
Before you start modifying the build settings you can also try deleting the Derived data in your install or build directory.
If the project cache is found in the standard location below you can do an Xcode clean and it will get rid of this data.
/Users/your_user_name/Library/Developer/Xcode/DerivedData/Path_To_Project/
If you defined your own install or build paths then go to that specific directory and delete that cache. Xcode should provide you the path if that error happens.
If Clean Build Folder doesn't help, make sure you don't have the same workspace/project opened in multiple Windows or Window Tabs!
(Xcode allows to open multiple tabs via File -> New -> Window Tab)
I've actually run into this EXACT same Compile-time error when I did the following in GitHub Client:
**Discarded changes in my Git Repo for an entitlement file.**
It's imperative like suggested above, "Clean Build Folder" or add USER defined key CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION to YES.
I know it's been answered above but I wanted to document the reproduction steps that led to the aforementioned error.
Like others have posted, this is resolved by cleaning the build folder or setting CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION to YES.
However, after cleaning the build folder, one build will succeed but any subsequent ones will fail with the same entitlements error until you clean the build folder again. Obviously this isn't optimal since it adds ~2-3 minutes per build even for one line changes.
The second solution involving CODE_SIGN_ALLOW_ENTITLEMENTS_MODIFICATION does away with the entitlements error entirely but install on physical devices fails every other build until build folder is cleaned. Same outcome really.
Does anyone actually know why this is happening in the first place? I inspected my entitlements file before and after build.. Nothing is changing. Is this just an xcode bug that costs us all hours of our lives?
error: Unable to resolve build file: XCBCore.BuildFile (missingTargetProductReference("3bf83096e50de72a94699e9afc1133ebe3512682230d04680075c283a974e273")) (in target 'MyTarget')
Xcode 10 is giving this error immediately when trying to build our project. It's not immediately clear what is causing it.
How can I resolve it?
For XCode 10 Beta: Problem occurs when I have two workspaces open that share the same project directories. Solution was
Short version
Shut down all but one workspaces
exit XCode and reopen XCode
XCode > Product > Clean Build Folder
Longer version
Shut down all but one workspace
XCode > Preferences > Locations > Derived Data > goto directory ~/Library/Developer/Xcode/DerivedData
Clear out subdirectories from DerivedData
exit XCode and reopen XCode
XCode > Product > Clean Build Folder
Thanks to #aferriss answer for the clue.
I came across this same error while using openframeworks 0.10 with xcode 10 recently. It seems like it was caused by having multiple openframeworks projects opened at a time. If you close them all one by one, and then reopen the one you'd like to work on, it should resolve the error. Hoping this is just an xcode-beta thing.
Xcode used to tell you that there as a workspace integrity problem, and you could just ignore it. But it seems like it's returned. There's some discussion about this issue here.
For me, XCode > Product > Clean Build Folder and restart Xcode then worked.
This was the culprit for my experience of the same error:
After setting the correct version of Command Line Tools (i.e., Xcode 10.2.1; see below) on my system, the error went away!
Just Restarted my Xcode and the problem went away
The key here is missingTargetProductReference, or you might get namedReferencesCannotBeResolved. Xcode can't find something.
This happened after upgrading to Swift5/Xcode10.
I found that removing linked frameworks and then re-adding them fixed the issue.
I had an embedded Xcode project that was not found (light blue). Deleting it and dropping it in again solved the issue.
In case this helps, I had a new repo and the Libraries weren't correctly linked.
I opened Xcode, cleaned, and went through, one by one, through Libraries on the menu. I clicked on it, which opened the info panel on the right, and pressed the small folder button, and found the path designated and clicked and opened, to make Xcode recognize those Libraries. Path names were often
/node_modules/react-native/Libraries/(something)/(something).xcodeproj
In my case, after trying all solutions in this question and some more (including updating Xcode 10.2 beta and even macOS), the only thing that worked was accessing the project bundle (right click > Show Package Contents) and remove everything except project.pbxproj:
project.xcworkspace
xcshareddata
xcuserdata
If you have a File Group which is backed by a physical folder and that physical folder has been deleted then you will get the same error "Unable to resolve build file: XCBCore.BuildFile".
In my case the physical folder has been removed (because I removed all "real" files from it) and in XCode group there was still one external project linked.
Solution:
- created a new group (without a folder) in XCode
- Moved external project reference there.
- rebuilt the project
Error gone.
For me there was a different solution after none of the above worked.
The problem started after using unlink for one of my packages.
Then for some reason, the Package was still there under Libraries, but it was greyed. After deleting the greyed Library, everything started working again.
My solution was that I was using the wrong Xcode version for the project I was working with. It still required 10.1 and I was attempting to run in 10.2. I instead opened it in 10.1 and the error went away while successfully compiling.
The problem is that on new xcode 10.2 there is a new BUILD Configuration, you need to change to LEGACY.
You can check how to change it here: https://medium.com/xcblog/five-things-you-must-know-about-xcode-10-new-build-system-41676cd5fd6c . CHECK THE GIF
So if you have a newer version of xcode different than the one used when the project was working probably this is what is causing the issue.
I have the same problem. Because a folder not upload to Git server, git not allow upload empty folder, then I create a folder in project folder, and it work well.
missing folder
In my case, it was a simple issue of a missing file.
Checked all secondary error messages. Error report said that my bridging-header.h file was not being found. Checked the path of the missing file from the target settings (just search for .h to get the right setting key). Fixed the new path and error went away.
The cause:
I had reorganized my folders after a system crash and added a second level to my project location.
I've faced the problem in Xcode 10.1.2. Xcode restarting and the clean project solve it in my case.
Seems like there are a number of reasons for which one runs into the same error. For my case, it was not having the Submodule checked out locally. After I made sure all my Submodules were downloaded, the error went away.
I had correct Command Line Tools and cleaning did nothing for me.
While resolving a merge conflict, A Group named "Recovered References" had appeared in my project navigator. Probably due to a mistake I made during merging. The Group was empty and deleting it fixed my problem.
I'm working with multiple people on an app in Xcode. Today I started Xcode and tried to run the app on my simulator, but it doesn't run. It builds and gives no errors, but the app won't appear on the simulator. As many questions suggested, I needed to select my executable in the schemes (Manage schemes -> ‘Scheme name’ -> Run -> Info -> ‘Executable dropdown’). But when I edit the scheme, my executable is not visible in the dropdown. Also the .app won't appear in the products folder as it usually does. How do I get it back?
I've tried many things like deleting Derived data, deleting the project and checkout again via version control, I even deleted everything related to Xcode and downloaded it again. But none of this worked.
I also read somewhere that AppCode (IDE from Jetbrains) stores the .app somewhere else. Perhaps this causes an issue with Xcode? But as I said, even if I download the bare project from source control, it builds but doesn't run.
I'm working with Xcode 9.1 at the moment. Also working With AppCode Version 2017.3 EAP.
Maybe the project.pbxproj file does not have the correct reference to the app executable. This might happen when a merge conflict occurs and is not solved correctly.
Try to look for differences in the project.pbxproj file, concerning the occurrences 'YourApp.app' and restore or adjust these where needed.
To look for these differences use the commit history in version control tools like Git Kraken.
When this is done, clear derived data and clean the project. Then build.
The app executable should pop up again now :)
I have a problem generating a iOS App archive from an application. The application compiles just fine and even works in the simulator. Now I wanted to make som ad hoc testing and cannot generate the iOS App Archive. When I click on the Product -> Archive it generates a generic xcode archive. Can anyone help me. I should mention, that I have already generated an iOS App Archive of this application. It has just stopped to generate iOS Archive for some reason. Thanks a lot.
Check Build Settings:
Skip install is NO for the main project target
Skip install is YES for framework (sub-projects) targets
In Build Phases for sub-projects, Copy Headers needs to be in Project, not Public (does not apply if building static library)
Installation Directory under Deployment is valid (/Applications for example)
This can happen if you've added a framework/library ... you need to edit the Target->Build Settings of that library and set the 'Skip Install' setting to 'Yes'. When you re-archive, XCode should start producing a 'iOS App Archive' again rather than a 'generic xcode archive'.
In addition of Skip Install to Yes and in case you opened another lib/framwork project within your app project you have to move headers (if any) from public to project in the Build Phase / Copy Headers.
I did the following to make it work for me:
I had a three20 static library, I used cocoapods to include the files within the main project
followed the skip install for all other sub projects/static libraries and switched the copy headers from public to project as stated above
most importantly: in each library your project uses go to build phases -> Copy Files and ensured that destination is changed from Absolute path to products directory. Note: see the hint below to narrow your search to find the library causing this error.
and that was it!
hint: to get an idea of the offending files that's causing your archive to create an archive file rather than an ipa do this:
Select the archive and click the Distribute button.
Select the 'Save Built Products' option.
Hit Next and Save.
Browse the created directory in Finder.
The 'libraries' subdirectory will identify the libraries that you need to set the Skip Install to Yes.
in some cases usr/local/include will identify the culprit header files you need to move from Public to Project or the files that you have to change from absolute path to products directory (or even the files you forgot to set the skip install to yes flag). but that directory (ie usr/local/include) varies depending on your sublibrary directory structure. In many cases.. you will see all the files listed under Copy Files in step 3 above listed here. If you find them here, then you have a definite answer for the cause of your problem.
update to hint: to make life even more simpler.. whatever files appears under step 4 in hint above.. simply search for it in the global search of xcode.. and you should get immediate results for what you want.. for example, this was the content of my folder (following the steps in hint above):
So I could tell it has something to do with the crypto and ssl libraries.. searching for them:
made me realize that i forgot to set skip install to yes.
If you export the archive, open it and see /urs/local/include in Products try this suggestion:
In each pod, under Packaging, Private Headers Folder Path and Public Headers Folder Path is set to /usr/local/include. If I clear them then I get a valid archive.
Worked for me after upgrading my React Native app to 0.11.0, Xcode 7 and CocoaPods 0.39.0.beta.4.
If you're using CocoaPods as well as WatchKit or a Today Extension, there is an open issue on the CocoaPods repo explaining what your problem might be.
The solution for me was to remove the Copy Pod Resources phase from the WatchKit Extension and Today Extension targets under Build Phases. The project compiled and archived as expected once I did this.
Hope this helps someone, this had me stumped for an entire day!
If any of the above answers don't work, your issue is probably with cocoaPods. The latest update 0.38.1 messed things up for me, but then i downgraded to 0.37.1 and things returned to normal. Using Xcode 6.3.1
Later edit: updating to 0.38.2 will also fix this. More info about what caused this issue here: Cocoapods 0.38.1 failed to create valid Archive
Although I'm using Xcode5 and what sorted it for me was editing the Build Scheme - trying all of the above suggestions that were applicable didn't help in my case.
I had two targets, say, "App" and "App FREE". My problems with the generic archive happened when I was trying to Archive the FREE version, which I added after the 'normal' version of the app. In my case, when I selected its Scheme in the toolbar and chose Edit Scheme ... I saw that Build section had two targets, namely App and App FREE.
I unchecked all columns for App, leaving only App FREE's columns checked, and clicked OK. Next time I chose Product > Archive I got my App FREE instead of a Generic Archive. :)
If you have only single project, maybe this solution would be useful.
This problem had occurred, when I duplicated the target. As a result I had two targets parallel built. This was causing the issue. Generic IOS archive was built.
To turn the parallel built off go to
Manage schemes,
Edit scheme,
Build,
Remove the other target.
I had this problem after updating to iOS 9 and Xcode 7. Josh H's solution worked for me:
In each pod, under Packaging, Private Headers Folder Path and Public
Headers Folder Path is set to /usr/local/include. If I clear them then
I get a valid archive.
I also made a post install script for my Podfile to do this automatically!
post_install do |installer_representation|
installer_representation.pods_project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings['PUBLIC_HEADERS_FOLDER_PATH'] = [""];
config.build_settings['PRIVATE_HEADERS_FOLDER_PATH'] = [""];
end
end
end
Just add it to the bottom of your Podfile and run pod install
I had this issue. In my case, it was caused by keeping a Mac app target as a dependency of the iOS app.
The reason it was setup like this was that the Mac app was a tool used to generate some data for the iOS app, which was then included in the bundle.
I had to remove that dependency and build the tool separately before making a build of the iOS app itself.
In my scenario I was getting the erroneous "Generic Archive" only after I began including Swift code in my predominantly Objective-C project. After lots of troubleshooting and examination of the archive file that Xcode was spitting out, I noticed that the SwiftSupport folder (with the required dylibs for the Swift runtime) was in a different place in my archive than from a vanilla brand-new Swift project app archive.
I found the Installation Directory build setting and noticed it was set to a custom path in my project. I simply deleted it (setting it to its generic value of /Applications) and the next Build -> Archive I did worked as expected and gave me a proper iOS App Archive.
TL; DR: Make sure your Installation Directory build setting is set to its default value of /Applications when including Swift code in your app, especially if you are starting with an older project file that may have some unexpected legacy build settings.
I have multiple project in my workspace, (GTL, Pods and my main project) and this is what worked for me:
Select the Project, there will be 2 types there, there's the Project and there's the Targets.
For projects that is not your main like GTL or PODS:
Projects:
Skip Install = NO
Installation Directory = /Applications
// For pods
Private Headers Folder Path = ""
Public Headers Folder Path = ""
Targets:
Skip Install = YES
Installation Directory = /Applications
// For pods
Private Headers Folder Path = ""
Public Headers Folder Path = ""
For the main project (which is usually named the same as your product name):
Projects:
Skip Install = NO
Installation Directory = /Applications
Targets:
Skip Install = NO
Installation Directory = /Applications
Check the ios deployment target on each projects and targets to make sure they are all the same.
Leaving this here to save others from the same journey.
I found I needed to remove the same Copy Pod Resources build phase from a static library target in my workspace too.
Addition to Alex L 's answer.
Point 3. Change 'Build Settings' -> 'Public Header Folder Path' to 'include/xxx' also works.
If none of the above helped you...after a lot of time.......
I deleted the value in the Info.plist for Bundle Version because I was happy enough with just Bundle Version Short 1.0. Bad. Don't do this.
*Note I actually did this by editing it in the UI on the right not realizing it would put an empty key in the Info.plist file. I think that makes it invalid. My bundle showed up as other items while archiving and had no icon, and I couldn't upload to anywhere.
This boils down to invalid values in the Info.plist. If it's not a valid archive, try unzipping an old archive and dropping in / overwriting your current one and see if it fixes it when rebuilding the archive.
Go to Build Settings and add
yourAppName/Resources/dist.plist to the Code Signing Entitlements
Press cmd + B with iOS Device or a Real Device selected as Build Target
When done -> scroll to "Products" folder and right-click on yourAppName.app
Choose "Show in Finder"
Create a folder with Name Payload (capital "P")
Copy yourAppName into your Payload Folder
Create a zip from your Payload Folder
Rename the zip to yourAppName.ipa
DONE
After trying just about everything:
Clean, Archive
delete DerivedData, Archive
restart Xcode (I was using XCode7), Archive
combinations of above...
I then noticed my boot partition was 'low on free disk space'... about 1GB or so.
I rebooted, then got about 18GB free.
Then opened Xcode and project, performed Archive... and surprisingly (after an hour of trying to build an Archive) I finally got a non Generic Archive.
No idea if its a free disk issue which fixed it or a reboot of the macOS that fixed it, but it worked for me.
If you have any .xcodeproj files in Project>Targets>Build Phases>target dependencies remove it from there and then build your ipa. It works for me. Cheers
You can get answer here : xcode is creating generic xcode archive instead of iOS App Archive
In my case, i had to move both FMDB and BlocksKit to static libraries. Previously they were built as subprojects. Remember you can use lipo to create universal libraries. When building the final products, the simulator code will be stripped automagically.
Another possible reason for this is to have references in "Target Dependencies" to projects for a different platform. In my particular case, I was working on a project that shares code for OSX and iOS. In one of the iOS targets, I had accidentally added an OSX target as dependency.
In order to be thorough, I am posting my solution.
I experienced the exact same problem trying to build an Archive of an iOS project in Xcode 5.1.1 (5B1008). None of the above suggestions fixed the problem, and most of them were irrelevant (I had not added any Frameworks, and did not have any Public entries in the Copy Headers section of my Build Phases).
In my case, fixing the problem consisted of simply closing my project, deleting any archives that I had previously made, going to Preferences > Accounts, removing my developer account, quitting Xcode, relaunching, re-adding my developer account, starting the Archive process again. This fixed my problem immediately.
One more solution, since all the above didn't work for me...
Changed the User Header Search Paths (I suppose Header Search Paths would work just as elegantly) to "$(BUILT_PRODUCTS_DIR)/BlocksKit".
Background:
In BlockKit, the developers have structured the headers in the main project differently than the structure on deployment. So, you can't reference the headers in the project, and must reference the headers copied into the build directory.
The way this worked for me in (Xcode 5) I had 2 targets and when I edited the scheme, on the left pane of the scheme editor, you will see the [BUILD, RUN, TEST, PROFILE XXX.APP, ANALYZE, ARCHIVE] from the BUILD pane, you will see your project targets listed in a list. At the far right end you will see the ARCHIVE selections, make sure only one target is selected for archiving.
I had 2 of my targets selected in my project, I checked only the target I wanted in the product, and it worked!
I solved this error by opening solely the app project in XCode, ie. not opening a workspace comprising the application and other projects/libraries/frameworks.
Having 2 separate project, a framework or shared library and an iOS application, I had to open 2 different XCode windows, each by directly opening the .xcodeproj file instead of the common .xcworkspace, in order to preperly build each.
As a nice side effect, XCode no longer rebuilds every target of every project after I do a Clean, resulting in shorted build times.
Background: I am creating an open source SDK, and a demo iOS application. I had both opened in a single workspace.
Setting Skip install to YES on the SDK targets would prevent anyone from creating an archive, as it would be empty, so this was not an option. Using Project instead of Public headers would lead to an archive missing the header files that should be distributed, so this was not an option either.
For it was because i was working in a workspace.
The project did archived but would ne be displayed in the organizer window.
I closed the workspace and open the project on its own.
The archived has been opened in the organizer ... hope it's help.
In my case, I had a custom script that was copying some temporary files into:
${TARGET_BUILD_DIR}/myTempDir
That meant that, after investigating the archive to inspect its contents, I found right next to the .app file a myTempDir folder. Once I modified the script to save elsewhere things were sorted.
Try setting $(PROJECT_NAME)Headers in Framework projet's Public Headers Folder Path. You have to go to build settings of the Library Target then edit the Public Headers Folder path as $(PROJECT_NAME)Headers.
If using Xcode 7 with cocoapods v.0.38.2. Try removing copy pod resources from your today extension target.
I encountered this problem after adding a OS X command line tool to my iOS app's project, and Skip Install was set to NO by default for the command line tool's target. Since you obviously can't install an OS X binary to an iOS device, archiving defaulted to a generic Xcode archive. Setting Skip Install to YES for this target fixed the problem.
I was trying to merge branches and it resulted in the error "Unable to open project… cannot be opened because the project file cannot be parsed". I then tried to take the advice of other stackoverflow responses (namely to edit the file to remove the corruption), but was unable to edit the file. It appears that this is actually a directory, so maybe the structure of this changed with version 4.4 of xcode and since the response to Unable to open project... cannot be opened because the project file cannot be parsed was written.
I then tried to restore myProject.xcodeproj from my time machine backup. This does not work because it says that I don't have permission to access myProject.xcodeproj. I tried to change the permission of that directory, but that did not help.
I closed and reopened xcode. Now the error is:
Project ...xcodeproj cannot be opened because it is missing its project.pbxproj file.
How can I fix this problem in xcode version 4.4? Can it be restored from the previous snapshot or archive or version in xcode. Can it be restored with time machine. I would like to avoid rebuilding the entire project.
The simplest thing to do is probably to
Checkout myProject.xcodeproj from source control. This will contain the changes that were causing you to be in conflict last time.
Redo the project changes that you made since the last time you committed to source control
commit/push to source control.
In the future, when you get a conflict in the project file, take a look at myProject.xcodeproj/project.pbxproj. Often it's just new files in the project that have been added at the same place. In this case you just need to delete the conflict metadata and resolve the conflicted state.
In the end, what I had to do was
'cp -R ...TimeMachineBackup/myProject.xcodeproj ...myProjectArea/myProject.xcodeproj'
Then I had to do the following in myProjectArea:
git reset --merge
This allowed me to open the project and switch branches back to my main branch.
not a pleasant experience
Another way this can happen is if you've been using sudo for some reason with pods or the editor - if the file exists under yourApp.xcodeprojectroj directory but xcode is complaining it can't find it - Go to your project root and do:
sudo chown -R yourusername:staff ./*
For others looking at this issue, the cause in my case turned out to be, that the "conflict text" from a git merge had crept into the actual file:
<<<<<<< HEAD
F0FDA2D61B99EB80007DB99D /* Aptron-mCollegix.xcassets */,
=======
F08CFAAA1BC1E9EE00A5B6F5 /* Aptron-mCollegix.xcassets */,
>>>>>>> hotfix/Column_Text_Cut-off
opening the project.pbxproj in a text editor made the fix easy.
I found my own solution to this issue.
The cause of the bug is that the .xcodeproj file is missing its containing pbxproj file, right? This is usually present when you right click your .xcodeproj file and click 'Show Package Contents'. However, in your own case, it's been deleted, through some mistake or other of git versioning.
As you can't really generate a .pbxproj file, the solution I found was to go to the original project folder location, which I had used to create the repository. To be honest, you could probably simply create a new project also, as long as it has the same bundle identifier and such! As this project's xcodeproj file will correctly contain a .pbxproj file, replacing the files in the XCode environment with your own project's files will allow the .pbxproj file to update based on these files.
Therefore, after opening this original project folder (/new project folder), in the XCode environment, I then removed all the files within the project, and replaced them with the corresponding files from my project which I was unable to open the xcodeproj file of. I had to fix a few resulting bugs here and there, stuff involving build phases and such not lining up, given you've just copied in a bunch of new files. But after fixing a few small errors, the same project in this new location was eventually able to run no problem!
Finally, I took this successfully running version of the project, and copied in all the files, .xcodeproj file, project folder, test files and all, into the original repository location, deleting the files from the repository before hand to avoid confusing overwriting of files (you can cut and paste the old repository files to a new location if you want to be safe, and don't fancy deleting them!). Then open the project in XCode from the repository location, build and run it on your simulator/device to make sure everything lines up (and fix any small bugs you may need to), and voila! Your project is now able to be committed, pushed, and ran!
This isn't the cleanest solution, and you may have to do similar things across various branches if they've all been corrupted. However, if you don't have access to a Mac time machine, and the other solutions aren't working for you, this is possibly the most straight forward way of having a working .pbxproj file again!
Oh, and I removed the .pbxproj from my gitignore. I'm not sure if it's actually find to have it in your gitignore or not, but I'd recommend doing your own research on that subject, I'm not certain myself!
Good luck!
I was able to get this working without commandline stuff like this:
Go to Time Machine drive in Finder.
Navigate to desired backup.
Drag it to where I want it. This will complain about not having permission to access the .pbxproj
Right-click the xcodeproj you just dragged out, select "Show Contents".
Right-click the xcodeproj in the Time Machine backup folder, select "Show Contents".
Drag the .pbxproj you see inside to the destnation you just created with the drag in #3.
Now it should work.
It seems you can generate the file again with:
swift package generate-xcodeproj
although you could see this message:
warning: Xcode can open and build Swift Packages directly. 'generate-xcodeproj' is no longer needed and will be deprecated soon.
generated: ./BokenEngine.xcodeproj
with xcodebuild > 13.4.1:
xcodebuild -version
Xcode 13.4.1
Build version 13F100
If anyone wants to find the missing project.pbxproj file then try opening the .xcodeproj with some code editor and you will find the file there. And note that i had backup of my application in my other pc so i found that file there so you mist have backup of your project somewhere in order for this to work.
In my case the issue was that there were actually 2 folders with .xcodeproj suffix
The actual one was located in MyApp/MyApp.xcodeproj
Somehow another one with the same name MyApp.xcodeproj got added to root folder, with the following contents:
project.xcworkspace/contents.xcworkspacedata
project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
So deleting this corrupt(?) xcodeproj solved the issue.