TOPIC:

With respecty to the version, yes taht is correct. If you install from github, there is no specific sub-version number.

You could still install the 3.12 update package from the community website, because that will have a version number.

Other than that there is not much difference.

Did you try to move a project with a different name? Just to see if it has anything to do with a particular project of folder name?

As I tried, the problem is with specific objects only. And I cannot move them anywhere else in the folder structure. All of those objects were created by my co-author. My own objects I can move without problems. My co-author also cannot move them.
BTW, my co-author cannot create folders, is this normal?

I had another look at your screencast and now some things are more clear:

The top folder is a shared folder, I assume you are the creator of that folder and you shared it with your co-author. Correct?

1. Then indeed, your co-author cannot create folders in that structure. Only the creator can create subfolders in a shared folder.
2. I'll test again with moving a project to a folder, becasue that should have worked.

Hi Ingo,

I am trying to replicate issue 2. in oder to ficx it, but so far I am not successfull.

My understanding is that you shared a folder with a person as co-outhor and that person placed a project in the shared folder.
Now you try to move that project in a different folder in that same folder structure. Is that correct? At this moment that seems to work for me.

That is correct. I could provide some log files when reproducing the issue if you want, you just need to tell me what I'd need to provide you with.