Runtime Error

Hello, I am having this issue while running this flutter app. Anybody faced this issue and know how to solve it?

```
Launching lib\main.dart on V1813A in debug mode...
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
FAILURE: Build failed with an exception.
* What went wrong:
Could not resolve all files for configuration ':app:debugCompileClasspath'.
> Could not find support-v4.aar (androidx.legacy:legacy-support-v4:1.0.0).
Searched in the following locations:
https://dl.google.com/dl/android/maven2/androidx/legacy/legacy-support-v4/1.0.0/support-v4-1.0.0.aar
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 22s
*******************************************************************************************
The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
See https://goo.gl/CP92wY for more information on the problem and how to fix it.
*******************************************************************************************
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)
```

Start with lib\main.dart and the Android build output, then investigate the unresolved androidx.legacy:legacy-support-v4:1.0.0 dependency and the reported AndroidX incompatibility. Done means the Flutter app builds successfully in debug mode without the dependency-resolution failure.

Written by the indexing model from the issue text.