i was using Moodle 3.3.4 with no problem. Since i've installed Moodle 3.3.5, i've got problems doing backups for some courses (a lot) ; other courses backup well.
Automatic backups fails, manual backup (and importation) are also concerned.
When doing a backup (with everything), when trying to go to the step 3 (confirmation), i got an error message : error/setting_invalid_filename
For the moment, i've not found where the problem comes from.
Do other people have the same problem? Ideas about it? A solution?