Diagram App "File not Found" after Xwiki- Upgrade to 14.4

Hello, everyone,
since the update to XWiki 14.4 only existing diagrams can be edited. Uninstalling and reinstalling the diagram app extension didn’t help.
Error message when creating a new diagram is “File not found”. the Draw.io (diagram 1.2 free) loads and can also be operated. You can also save and the wiki page will be created.
But nothing is displayed except for a rotating circle.
If you copy an existing Xwiki Diagram page, the XML content is available, but the error message “File not found” appears when editing.

Thank you for your help

Hello, everyone,
I think I was able to narrow down the problem with “File not Found”: The problem only seems to occur when the document title starts with “list…”. Can someone replicate this?