Please help me to remove the bug from android studio - android-studio-3.0

When I start the android studio, it is throwing an exception message happened due to flutter and updation on android studio.Please help me to fix the bugenter image description here
Please click on the this link to check the screenshot of the bug I encountered and please help me with the issue.
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unexpected code 404 on publishing react native app on expo

I have been trying to publish my react-native app on expo so I can show it to others.
But i am facing error. I looked up on internet but couldn't find solution that can solve my problem.
The error is:
Building iOS bundle
Packager URL http://127.0.0.1:80/index.bundle?dev=false&minify=true&hot=false&platform=ios returned unexpected code 404. Please open your project in the Expo app and see if there are any errors. Also scroll up and make sure there were no errors or warnings when opening your project.
I am using visual studio code and when i run app by
expo start
It opens.. shows QR code... I scan with my iphone..and app opens in expo client.. works perfectly fine there but the above error comes when i try to publish.
can anyone tell me what might be the issue here please ?
Try to publish the app again unchecking the 'Optimize Assets' checkbox. This works for me.

Flutter error when running for release. IN debug works fine

I receive an error when ever I try to run the Release version of my app and the app sticks on the launch screen. I never have an error with the debug version, which has been well tested.
I haven't been able to find any information on this error message here at Stackoverflow or in the git forums. So hoping someone can help me on this one, as I'm completely stuck!
Here is the error message from Xcode:
2019-10-30 11:00:28.072780+0800 Runner[1311:409348] Metal API Validation Enabled
../../third_party/dart/runtime/vm/exceptions.cc: 425: error: unreachable code
Any help would really be appreciated. Thanks
I solved this issue by changing to a newer version of Dart, which contained a fix for this issue.
I did this by switching my channel to run on Master Channel (from Beta channel).
Here's is some instructions that I used, I hope it can be of help to anyone else experiencing this issue:
Flutter Channels - Github

Unable to open DDMS in Xamarin

I am developing an xamarin cross platform application when I am trying to open DDMS the following error message is displayed as
An error has occurred see the log file
C:\Users\USERNAME.eclipse\org.eclipse.platform_4.2.0_1433552022\configuration ,when I checked for this problem the solution was to give permissions and run as administrator I did it but still the error message is being generated ..
please help me to resolve the problem .Thanks

Facing issue "Lexical Preprocessor Issue" XCode 9

I am working on a Bluetooth application. I am using this Printer Framework. But I am facing "Lexical Preprocessor Issue". The file framework is present in the code still not working. I deleted the file and again added it but still no luck. Tried many things but unable to fix the issue. Please check the screenshot attached
Please help guys

how to use couchbase.lite with link sdks only option in Xamarin ios

Now I am using Couchbase.Lite in iOS project, but it throws an error with Initialising in Linker Option with link sdks only,
Anybody has this kind of problem before?
But with don't link option, it works okay.
In this case, we can deduce the ipa size to publish app in App Store.
Can you help me out, if you faced this kind of problem before.
Thanks,
Please check this bug report: https://bugzilla.xamarin.com/show_bug.cgi?id=36255. Its been worked on.
The workaround for now will be to use "-nolinkaway" as this will only have a minimal increase in the final app size, unlike "dont link sdk".

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