title: flutter run does not work on iOS Simulator but Xcode can build
body: <p>In my Flutter project, <code>flutter run</code> command cannot build project to iOS Simulator but in Xcode when I click build button, Xcode can build it with no problem. I'm using AgoraRTC libraries. After adding Flutter Quill this happened. I deleted all derived datas. Cleaned build folder. Did flutter clean. Rm ios/podfile then pod install, upgrade dependencies etc. but none of them solved my problem.</p>
  <p>Do you know how to fix this problem?</p>
  <pre><code>flutter doctor -v result
  [✓] Flutter (Channel stable, 2.2.2, on macOS 11.4 20F71 darwin-x64, locale en-GB)
      • Flutter version 2.2.2 at /Users/user/development/flutter
      • Framework revision d79295af24 (3 weeks ago), 2021-06-11 08:56:01 -0700
      • Engine revision 91c9fc8fe0
      • Dart version 2.13.3
  
  [!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
      • Android SDK at /Users/user/Library/Android/sdk
      • Platform android-30, build-tools 30.0.3
      • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
      ✗ Android license status unknown.
        Run `flutter doctor --android-licenses` to accept the SDK licenses.
        See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.
  
  [✓] Xcode - develop for iOS and macOS
      • Xcode at /Applications/Xcode.app/Contents/Developer
      • Xcode 12.5.1, Build version 12E507
      • CocoaPods version 1.10.1
  
  [✓] Chrome - develop for the web
      • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
  
  [✓] Android Studio (version 4.2)
      • Android Studio at /Applications/Android Studio.app/Contents
      • Flutter plugin can be installed from:
         https://plugins.jetbrains.com/plugin/9212-flutter
      • Dart plugin can be installed from:
         https://plugins.jetbrains.com/plugin/6351-dart
      • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
  
  [✓] VS Code (version 1.57.1)
      • VS Code at /Applications/Visual Studio Code.app/Contents
      • Flutter extension version 3.23.0
  
  [✓] Connected device (2 available)
      • iPhone 12 Pro Max (mobile) • 51D141E2-C032-43E0-A6F8-0E6C24D78AEC • ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-5 (simulator)
      • Chrome (web)               • chrome                               • web-javascript • Google Chrome 91.0.4472.114
  
  </code></pre>
  <pre><code>
  
  warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/AgoraAIDenoiseExtension.xcframework AgoraAIDenoiseExtension framework
     ios-armv7_arm64 ios-x86_64-simulator' for the current build architectures (arm64 x86_64 i386).
     warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/AgoraRtcKit.xcframework AgoraRtcKit framework ios-x86_64-simulator
     ios-armv7_arm64' for the current build architectures (arm64 x86_64 i386).
     warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/Agoraffmpeg.xcframework Agoraffmpeg framework ios-armv7_arm64
     ios-x86_64-simulator' for the current build architectures (arm64 x86_64 i386).
     warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/AgoraCore.xcframework AgoraCore framework ios-armv7_arm64
     ios-x86_64-simulator' for the current build architectures (arm64 x86_64 i386).
     warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/AgoraSoundTouch.xcframework AgoraSoundTouch framework ios-x86_64-simulator
     ios-armv7_arm64' for the current build architectures (arm64 x86_64 i386).
     warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/Agorafdkaac.xcframework Agorafdkaac framework ios-x86_64-simulator
     ios-armv7_arm64' for the current build architectures (arm64 x86_64 i386).
     warning: [CP] Unable to find matching .xcframework slice in '/Users/user/AndroidStudioProjects/projectx/ios/Pods/AgoraRtcEngine_iOS/AgoraDav1dExtension.xcframework AgoraDav1dExtension framework
     ios-x86_64-simulator ios-armv7_arm64' for the current build architectures (arm64 x86_64 i386).
  
  
  </code></pre>