WebDAV failed with SSL_ERROR_PROTOCOL_VERSION_ALERT

incoggnito · December 8, 2020

Can't sync to my nextcloud server.
Which TLS-Version is used on zotero?

dstillman · December 8, 2020

Zotero is currently based on Firefox 60 ESR and supports everything that supported — TLS 1.0 through 1.3 (though technically a draft version of 1.3).

incoggnito · December 13, 2020

Ok, thank you. I want to sync to my nextcloud webdav. It seems there is some kind of problem with my ssl. I use a namecheap-ssl. What could i try to fix this error?

dstillman · December 13, 2020

We can’t help debug third-party WebDAV servers, sorry.

elumbella · February 11, 2021

Hello incoggnito! I had the same problem. Turns out I had disabled TLS1.2 in my apache configuration for nextcloud. Maybe, the draft version of TLS1.3 that zotero/firefox uses doesn't really work with all certificates. After allowing TLS1.2 certificates, zotero is now able to connect and sync. I hope that helps!