2017-08-10 16:10:35 4684 [HttpClient] --> END PROPFIND (290-byte body)
2017-08-10 16:11:05 4684 [HttpClient] <-- HTTP FAILED: java.net.SocketTimeoutException: connect timed out
2017-08-10 16:11:05 4684 [ui.setup.DavResourceFinder] PROPFIND/OPTIONS on user-given URL failed
EXCEPTION java.net.SocketTimeoutException: connect timed out
There was a timeout. This is a connectivity problem. Did you try another network? Can you access the URLs with your browser on the mobile device? Did you try another connection type? Are there any firewalls which could block the access?