Just returned to a project after a couple of weeks and it now has 84 errors. I have made no changes.

The first seems to be for the line

import androidx.appcompat.app.AppCompatActivity;

gives a “Cannot resolve symbol ‘AppCompatActivity'” error.

Same for my other projects as well.

Thanks

Changed the Gradle version in File/Project Structure yo 8.7 and this has gone away.

Now left with only 32 errors – all “Cannot access member because ‘R’ has primitive type int” (See attachment)