I had this problem for a while and was able to solve it myself.
If in opening your project in Android Studio and something similar to this error message pops up:
I guess the problems depends on each situation. I was using Flutter in Android Studio and suddenly one day this problem occurred.
Just delete the project_name.iml in Flutter project and project_name_android.iml in android module.
For android projects simply delete .iml file in the project.
After deleting restart Android Studio and follow the steps as in this video. It was of great help.