title: D/FlutterActivityAndFragmentDelegate(29168): No preferred FlutterEngine was provided. Creating a new FlutterEngine for this FlutterFragment.Flutter:
body: <p>I have a problem running my android flutter app.
  Yesterday, my app ran successfully without any problem.
  But today, whenever I try to run my app, it always gives me the next outputs and doesn't run.
  The debug console keeps printing these :</p>
  
  <pre><code>Launching lib/main.dart on SM A405FN in debug mode...
  ✓ Built build/app/outputs/apk/debug/app-debug.apk.
  D/FlutterActivity(29168): Using the launch theme as normal theme.
  D/FlutterActivityAndFragmentDelegate(29168): Setting up FlutterEngine.
  D/FlutterActivityAndFragmentDelegate(29168): No preferred FlutterEngine was provided. Creating a new FlutterEngine for this FlutterFragment.
  D/FlutterActivityAndFragmentDelegate(29168): Attaching FlutterEngine to the Activity that owns this Fragment.
  </code></pre>
  
  <p>And weirdly, my app keeps stopping on my phone.</p>
  
  <p>If you wonder about my <code>flutter doctor -v</code>, I can assure you that everything is fine.</p>
  
  <pre><code>[flutter] flutter doctor -v
  [✓] Flutter (Channel stable, v1.12.13+hotfix.8, on Linux, locale en_US.UTF-8)
      • Flutter version 1.12.13+hotfix.8 at /home/henimbola/dev_env/flutter
      • Framework revision 0b8abb4724 (3 weeks ago), 2020-02-11 11:44:36 -0800
      • Engine revision e1e6ced81d
      • Dart version 2.7.0
  
  [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
      • Android SDK at /home/henimbola/Android/Sdk
      • Android NDK location not configured (optional; useful for native profiling support)
      • Platform android-29, build-tools 29.0.2
      • Java binary at: /home/henimbola/IDEs/android-studio/jre/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
      • All Android licenses accepted.
  
  [✓] Android Studio (version 3.6)
      • Android Studio at /home/henimbola/IDEs/android-studio
      • Flutter plugin version 43.0.2
      • Dart plugin version 192.7761
      • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
  
  [!] IntelliJ IDEA Ultimate Edition (version 2019.2)
      • IntelliJ at /home/henimbola/IDEs/idea-IU-192.6603.28
      ✗ Flutter plugin not installed; this adds Flutter specific functionality.
      ✗ Dart plugin not installed; this adds Dart specific functionality.
      • For information about installing plugins, see
        https://flutter.dev/intellij-setup/#installing-the-plugins
  
  [✓] VS Code (version 1.42.1)
      • VS Code at /usr/share/code
      • Flutter extension version 3.8.1
  
  [✓] Connected device (1 available)
      • SM A405FN • R58M66L8L9J • android-arm64 • Android 9 (API 28)
  
  ! Doctor found issues in 1 category.
  exit code 0
  </code></pre>
  
  <p>If anyone can help me please. I've been searching around the internet.</p>