Various changes were made during work to make the site GDPR compliant to Googlem AdSense’s standard’s, but nothing that should have affected the Classic Editor.
I tried deactivating, deleteing and reinstalling it, and ever trried an alternative classic seditor puilug-in, but it still deafults to text input screen.
I’m afraid that has led me to experiment with the blocks editor instead and I’m finding I can do what I need to do – progress I suppose!