@thomas The file I wanted to upload is a 25 MB jpg, so it should be within size limits. I get a 422 error, saying 12000x9000 iamges are not supported. You may recall I had a similar problem with animgif headers - is it that the server encodes the image in the database in whatever format, ending up with more than 90 MB?
Anyway, I'll decrease dimensions until it's acepted 😘