Zotero fails to connect to a WebDAV server (debug D136412863).

Hi.
All of a sudden Zotero has stopped synching with WebDAV library, I've never seen this error before -- it fails to connect to the server in an unusual way:
(3)(+0000000): Unverifying storage
(3)(+0000000): Getting WebDAV password
(3)(+0000002): WebDAV password hasn't changed
(3)(+0000002): Unverifying storage
(3)(+0000000): Verifying storage
(3)(+0000002): Getting WebDAV password
(3)(+0000002): HTTP OPTIONS https://Alexander.S.Grushin@mail.ru:********@webdav.cloud.mail.ru/zotero/
(3)(+0000002): {}
(2)(+0000334): Overriding status for invalid response for https://Alexander.S.Grushin@mail.ru:********@webdav.cloud.mail.ru/zotero/ (2152398861)
(1)(+0000002): HTTP OPTIONS https://Alexander.S.Grushin@mail.ru:********@webdav.cloud.mail.ru/zotero/ failed with status code 503
(2)(+0000000): Channel status was 2152398861
(2)(+0000000): Response status was 503
(1)(+0000002): The server webdav.cloud.mail.ru could not be reached.
(1)(+0001236): WebDAV verification failed

And shows message, that the server cannot be reached. Although the server is perfectly reachable via NetBox and it perlies to pings and moreover, I can succesefully sync Zotero with exactly the same server from another computer (second installation in the office).

What can it be? Maybe I have to reset something?
  • edited September 25, 2018
    A 503 is a Service Unavailable error — an actual message that the server (or something in between) is returning, not just a connection failure — so I'm afraid that's not something we can help with.
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