This is the SpillCollectorProcess, so maybe belongs in the other (more active) thread, however let’s see what your other stack trace looks like (if you were planning to post it) before maybe moving debug efforts. Feel free to go over to the other one to see what the discussion has been. Probably some applies here…
I’d note that the original post in the other never got specific, but a later participant posted this stack trace:
For yours, the “something else goes wrong first” might be below. If reproducible, you can watch About → Show log → Live → Retry or set up a –log-file at –log-file-log-level=retry to get a better look at the server:
Any idea what that’s about? Does the WebDAV server have any tools or logging that might show its view?
Although this is simply comparing bits of errors from various people, original author of other topic had this:
but didn’t link to the other thread. Maybe you can go see if you can find it, to add to the evidence collecting.