kb:ssl_certificate_error [Zotero Documentation]

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"SSL certificate error connecting to sync.zotero.org"

The above message sync error indicates a problem with either your Firefox installation (if you're using Zotero for Firefox) or your network. The zotero.org SSL certificate is always valid, so this message does not indicate a problem with the Zotero server.

Try the following steps to debug the problem:

Restart Firefox and/or your computer and try syncing again. This error can be caused be intermittent network issues.
If you get the same error after restarting, load https://sync.zotero.org (with 'https', not 'http') in Firefox.
1. If you see the message “Nothing to see here”, continue to Step 3.
2. If Firefox displays an SSL certificate warning, there is a serious problem with either your Firefox installation or your network. Do not whitelist the certificate, as zotero.org's certificate is not invalid and you will no longer have any guarantee that your connection to zotero.org is secure. To see if the problem is on your computer or your network, create a new Firefox profile and connect to https://sync.zotero.org from there, or try with a different browser.
  1. If you see “Nothing to see here” in the new profile, your original Firefox profile is corrupt, and you will need to either repair it or copy your data to the new profile, including your Zotero data.
  2. If Firefox continues to display the certificate warning in the new profile, someone may be intercepting your web traffic. Talk to your network administrator or ISP. If they tell you to whitelist the certificate, be aware that your connection to zotero.org will no longer be secure.
If you see the message “Nothing to see here” after loading https://sync.zotero.org in Firefox but continue to get SSL certificate errors in Zotero, your sync requests may be getting interrupted, possibly due to security software or a proxy server on your network. If you are using security software, try disabling it. If you are using a laptop, try syncing from a different network. In rare circumstances, reinstalling Firefox or trying in a new Firefox profile may also help.

kb, sync