The layout in layout has no declaration in the base layout folder [error]

Question

After migrating to Android Studio 3.2, API 28, I am getting the following error on my app\'s layout:

The layout in layout has no declaration in the base lay

Answer 1

What solved it for me:

In Android Studio, right-click on the filename in the layout directory, and choose Reformat code, with no special tickbox selected on the next screen.

Not sure what exactly goes on under the hood here, but that worked.