A problem occurred configuring project ':libphonenumber'.

[dreamxgod]

I have an issue with this lib in the Android build, IOS working fine.
Any ideas?

• What went wrong:
  A problem occurred configuring project ':libphonenumber'.

Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
Namespace not specified. Specify a namespace in the module's build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

 If you've specified the package attribute in the source AndroidManifest.xml, you can use the AGP Upgrade Assistant to migrate to the namespace value in the build file. Refer to https://d.android.com/r/tools/upgrade-assistant/agp-upgrade-assistant for general information about using the AGP Upgrade Assistant.

[skalinets]

We fixed this particular error by adding following lines to `./android/build.gradle', (thanks to this answer in SO)

subprojects {
   afterEvaluate { project ->
       if (project.hasProperty('android')) {
           project.android {
               if (namespace == null) {
                   namespace project.group
               }
           }
       }
   }
}

After having done that and upgrading gradle, we managed to run the project from android studio, but not with flutter run