In my case, the error occurred due to the use of outdated Flutter plugins, specifically ones that rely on the old Android embedding (v1). Modern Flutter projects — especially those created using recent versions of Android Studio — are configured to use Android embedding v2, which is incompatible with v1-style plugins.

run this command:

flutter pub upgrade

2. Identify and Replace Deprecated Plugins

If upgrading doesn't resolve the issue, check the plugin’s page on pub.dev. If the plugin is:

• Discontinued or hasn't been updated in a long time
  → Replace it with a modern, actively maintained alternative.

3. Clean and Rebuild the Project

After upgrading or replacing the plugins, run the following commands:

flutter clean

flutter pub get