Moved the site to a VPS (2 vCores, 4GB, SSD). The site has not gone down.
As a plus, I also now have unrestricted control.
I do have two bugs.
The first one is that some categories and documents now have a blank name or no title.
I made a new user and this user can indeed made changes and it gets saved.
Can I just delete the older user and recreate him and be done?