解决 Your Flutter application is created using an older version of the Android

If you are here because of the flutter 2.10, do this:

Change this:

<application
    android:icon="@mipmap/ic_launcher"
    android:name="io.flutter.app.FlutterApplication"
    android:label="PassesBox"
    ...

To this:

<application
    android:icon="@mipmap/ic_launcher"
    android:name="${applicationName}"
    android:label="PassesBox"
    ...