Make compatible for latest Android structure to resolve namespace error

[devv-gmits]

A problem occurred configuring project ':cached_video_player'.

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.

[DanielOlv]

I have the same problem, transfer my project to newest folder, creating a new futter project and implementing all package.
I dont know what is the cause, if the reason why the package apinnio_video_player, i dont know

[Umeshkanase17]

i also get the same isssue