Unable to sync, error 404, Node with name '.resource' could not be found

Operating system

iOS

Joplin version

12.13.10

What issue do you have?

I cannot sync my Joplin store with my Apple iPhone 15 with updated Joplin app.
I get the following error logs in the app.
02-09T15:14:00: Synchronizer: "Error: PUT .resource/bf60c882b7194e48ab2e90f26904c4cd: Node with name '.resource' could not be found (Exception Sabre\DAV\Exception\NotFound) (404): <?xml version="1.0" encoding="utf-8"?>

The Joplin installation on my MacBook still works fine.
Logfile is attached.

Thanks in advance
Daniel