During a migration to a new hosting service, I upgraded from 1.28.0 to 1.28.2. Everything appeared fine for a few minutes -- and then all the images got replaced with a grey box and the text: Error creating thumbnail: File missing
On my macbook, this happens with firefox and chrome -- safari is working normal.
On my Win10 box, Edge and Chrome work, firefox again fails.
Safari on my ipad works.
The image directory is a copy of the one for version 1.28.0.