[Fatal Error] play-services-ads-21.0.0.pom:2:1: Content is not allowed in prolog.
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all files for configuration ':classpath'.
> Could not resolve com.google.android.gms:play-services-ads:21.0.0.
Required by:
project :
> Could not resolve com.google.android.gms:play-services-ads:21.0.0.
> Could not parse POM https://dl.google.com/dl/android/maven2/com/google/android/gms/play-services-ads/21.0.0/play-services-ads-21.0.0.pom
> Content is not allowed in prolog.
* 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 1m 41s
Exception: Gradle task assembleDebug failed with exit code 1
pleasea help meim using the flutter-mobile_ads paackage in pub.dev and this issue i delete everything about this package but still face this error