Heya! I have this same issue, sync is not working with WebDAV. My phone is Samsung Node 9. Android 10.
I’m using a VPN to connect to my LAN and so the WebDAV URL is http://192.168.0.23:8080/seafdav/Joplin. I don’t see anything of relevance in the logs though. The same stuff works on desktop Windows.
Both came up in the past and are a result of either a module we use or the underlying OS components. If you have any idea how to fix them, please let us know.
I am unable to sync (“Network request failed” msg) with Nextcloud and Joplin Android app.
My Joplin-v1.0.336 Android app was working well for months to sync with Nextcloud. But after I uninstall it and installed joplin-v1.0.337, the “Network request failed” message started and cannot be resolved.