Getting cannot access Fragment class file for androidx.fragment.app.Fragment while running the app on device

[myeduapp]

I am getting above error while building the app.I have followed the documentation. I am using support library and not latest androidx. Am I getting error because of it?

[LaoXiZi]

I also met, the authors are very busy, no time to change.

[karan0008]

I am also facing the same issue. Please help.