there is a server
There is a shared folder. In this folder, another user has created another folder with the wrong name. The folder created by the user contains shared files.
How to rename a folder?
What happens when the person who created the folder renames it?
The message appears
Unable to rename
All rights to the folder have been granted
ownCloud 10.4.1 has been released nearly 3 1/2 years ago (2020-03-30). Maybe you could try to see if the more recent version 10.12.2 doesn’t show this behavior (for example if this was a bug it could be already solved):