Ionic 4 Ios build getting blank screen - ios

Question

I am getting Failed to load resource: The requested URL was not found on this server. error when run app in iOS emulate and device, it is working fine in Android.
I have updated iOS platform version but still getting same error. I have try with removing plugin but still same error. Check screenshot
I have setup new blank ionic 4 project and build ios it is working fine.
Ionic:
Ionic CLI : 5.4.1 (/usr/local/lib/node_modules/ionic)
Ionic Framework : #ionic/angular 4.8.1
#angular-devkit/build-angular : 0.13.9
#angular-devkit/schematics : 7.2.4
#angular/cli : 7.3.9
#ionic/angular-toolkit : 1.4.1
Capacitor:
Capacitor CLI : 1.0.0-beta.24
#capacitor/core : 1.0.0-beta.24
Cordova:
Cordova CLI : 9.0.0 (cordova-lib#9.0.1)
Cordova Platforms : android 8.1.0, ios 4.4.0
Cordova Plugins : cordova-plugin-ionic-webview 4.1.3, (and 15 other plugins)
Utility:
cordova-res : 0.6.0 (update available: 0.8.1)
native-run : 0.2.8 (update available: 0.2.9)
System:
Android SDK Tools : 26.1.1 (/Users/chetan/Library/Android/sdk)
ios-deploy : 1.9.4
NodeJS : v10.15.3 (/usr/local/bin/node)
npm : 6.4.1
OS : macOS Catalina
Xcode : Xcode 11.1 Build version 11A1027

Answer 1

I find at a solution for this problem, follow the next step:
1) close Xcode;
2) Make sure localhost is allowed in config.xml:
<allow-navigation href="http://localhost:8080/*" />
<preference name="CordovaWebViewEngine" value="CDVUIWebViewEngine" />
<platform name="ios">
...
Run
$ ionic cordova plugin remove cordova cordova-plugin-ionic-webview --save
$ rm -rf platforms/
$ rm -rf plugins/
inside of the tag platform ios
<feature name="CDVWKWebViewEngine">
<param name="ios-package" value="CDVWKWebViewEngine" />
</feature>
<preference name="CordovaWebViewEngine" value="CDVWKWebViewEngine" />
finally run:
ionic cordova build ios

Answer 2

I have found solution of the error
Adding WKWebView to your app
In order to add WKWebView, we need to add the plugin from the Ionic repository.
ionic cordova plugin add cordova-plugin-ionic-webview --save
If you already had the plugin installed, or were using a different version/fork, you’ll need to uninstall what you have first.
ionic cordova plugin rm cordova-plugin-WKWebView-engine
And that’s it! Once the plugin install is done, your next native build will include a faster, lighter, and more modern webview!
https://ionicframework.com/blog/wkwebview-for-all-a-new-webview-for-ionic/