title: flutter_launcher_icons not working (app launcher icon broken/crashed)
body: <p>I'm struggling with changing App Launcher Icon using flutter_launcher_icons package, on my iPhone Simulator (iOS 14.4).</p>
  <p>In my <code>pubspec.yaml</code>:</p>
  <pre><code>dev_dependencies:
    flutter_test:
      sdk: flutter
    flutter_launcher_icons: ^0.9.2
  
  flutter_icons:
    #image_path_android: &quot;assets/icon.png&quot;
    image_path: &quot;assets/icon.png&quot;
    android: false
    ios: true
  </code></pre>
  <p>On VScode terminal (in my project root directory):</p>
  <pre><code>&gt; flutter pub run flutter_launcher_icons:main
    ════════════════════════════════════════════
       FLUTTER LAUNCHER ICONS (v0.9.1)                               
    ════════════════════════════════════════════
    
  • Overwriting default iOS launcher icon with new icon
  
  ✓ Successfully generated launcher icons
  
  &gt; flutter run                     ✔
  Multiple devices found:
  Android SDK built for x86 (mobile) • emulator-5554                        • android-x86 • Android
  11 (API 30) (emulator)
  iPhone 12 Pro Max (mobile)         • 0A68628E-A233-40C2-8B07-504F23A5FD81 • ios         •
  com.apple.CoreSimulator.SimRuntime.iOS-14-4 (simulator)
  [1]: Android SDK built for x86 (emulator-5554)
  [2]: iPhone 12 Pro Max (0A68628E-A233-40C2-8B07-504F23A5FD81)
  Please choose one (To quit, press &quot;q/Q&quot;): 2
  Launching lib/main.dart on iPhone 12 Pro Max in debug mode...
  Running pod install...                                             16.4s
  Running Xcode build...                                                  
   └─Compiling, linking and signing...                        15.4s
  Xcode build done.                                           267.2s
  Syncing files to device iPhone 12 Pro Max...                        90ms
  
  Flutter run key commands.
  r Hot reload. 
  R Hot restart.
  h List all available interactive commands.
  d Detach (terminate &quot;flutter run&quot; but leave application running).
  c Clear the screen
  q Quit (terminate the application on the device).
  
  Running with unsound null safety
  For more information see https://dart.dev/null-safety/unsound-null-safety
  
  An Observatory debugger and profiler on iPhone 12 Pro Max is available at:
  http://127.0.0.1:51673/MS0nx6nWyeg=/
  The Flutter DevTools debugger and profiler on iPhone 12 Pro Max is available at:
  http://127.0.0.1:9101?uri=http://127.0.0.1:51673/MS0nx6nWyeg=/
  </code></pre>
  <p>But in the Simulator, app launcher icon is broken ('Runner' is the App):</p>
  <p><a href="https://i.stack.imgur.com/vE5ts.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vE5ts.png" alt="enter image description here" /></a></p>
  <p>In <code>~/ios/Runner/Assets.xcassets/AppIcon.appiconset/</code>, I can see that the image files are correctly changed.</p>
  <p>How can I fix this? Maybe it's not package problem, but iOS build problem??</p>
  <hr />
  <ul>
  <li>Result of <code>flutter doctor -v</code>:</li>
  </ul>
  <pre><code>&gt; flutter doctor -v               ✔
  [✓] Flutter (Channel stable, 2.5.3, on macOS 11.6 20G165 darwin-x64, locale ko-KR)
      • Flutter version 2.5.3 at /Applications/flutter
      • Upstream repository https://github.com/flutter/flutter.git
      • Framework revision 18116933e7 (4 weeks ago), 2021-10-15 10:46:35 -0700
      • Engine revision d3ea636dc5
      • Dart version 2.14.4
  
  [✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
      • Android SDK at /Users/kws/Library/Android/sdk
      • Platform android-31, build-tools 31.0.0
      • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)
      • All Android licenses accepted.
  
  [✓] Xcode - develop for iOS and macOS
      • Xcode at /Applications/Xcode.app/Contents/Developer
      • Xcode 12.4, Build version 12D4e
      • CocoaPods version 1.11.2
  
  [✗] Chrome - develop for the web (Cannot find Chrome executable at /Applications/Google
      Chrome.app/Contents/MacOS/google-chrome-unsafe)
      ! /Applications/Google Chrome.app/Contents/MacOS/google-chrome-unsafe is not executable.
  
  [✓] Android Studio (version 2020.3)
      • 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 11.0.10+0-b96-7281165)
  
  [✓] IntelliJ IDEA Community Edition (version 2019.2.1)
      • IntelliJ at /Applications/IntelliJ IDEA CE.app
      • Flutter plugin version 43.0.2
      • Dart plugin version 192.8052
  
  [✓] VS Code (version 1.62.1)
      • VS Code at /Applications/Visual Studio Code.app/Contents
      • Flutter extension version 3.28.0
  
  [✓] Connected device (2 available)
      • Android SDK built for x86 (mobile) • emulator-5554                        • android-x86 •
        Android 11 (API 30) (emulator)
      • iPhone 12 Pro Max (mobile)         • 0A68628E-A233-40C2-8B07-504F23A5FD81 • ios         •
        com.apple.CoreSimulator.SimRuntime.iOS-14-4 (simulator)
      ! Error: Errors were encountered while preparing your device for development. Please check the
        Devices and Simulators Window.  (code -1)
  
  ! Doctor found issues in 1 category.
  </code></pre>