Ok. I'm now running 3.7.21. I'm still seeing the error `Last error: Error: PUT 193448bddb3c47718803aa31da07bcdf.md: Unknown error 2 (405): Method Not Allowed`.
I presume the 405 is being returned by my server, rclone serve webdav. I note that the configuration of joplin's webdav sync method allows only the http and https protocols, not dav. I don't know whether this is the cause of the error. PUT is a valid http method, and I thought webdav extended, rather than modified, http.
Does anyone know why dav is not allowed in the joplin config?
Here is a link to the issue I raised at rclone
https://forum.rclone.org/t/405-response-to-joplin-sync/54288