You should nevertheless check your system proxy settings to make sure nothing is enabled. Also provide a Report ID, if you can — and if not, you can paste the output of the error report here.
on Windows, the "system proxy settings" are (for all practical purposes) the proxy settings set in Internet Explorer under Internet Connections.
See here for more technical details: http://superuser.com/a/29828/361865
On Mac it's under System Preferences --> Network --> Advanced --> Proxies.
I'm using a mac. I'm still not sure what I'm looking for here; is it this? In the box titled "bypass proxy settings for these hosts & domains," it says: "*.local, 169.254/16"
No, that doesn't affect updates. Are any other proxy options enabled in that dialog? What do you see if you check the site certificate info for zotero.org in your browser?
I'm facing the same problem as mh and lucia.lykke, using a Mac as well, no proxies enabled. The update concerns the locally installed Zotero, so I am not sure which site certificate info I could check. Can anyone help?
The site is zotero.org -- the steps let's you check whether you're seeing the correct certificate for Zotero. Malware, some security software, (as well as some proxy servers) can change the certificate and thus break the connection.
You're running an ancient version of Zotero (from 2018), so it looks like this has been broken for you for years. Just install a new version from the download page.
See here for more technical details: http://superuser.com/a/29828/361865
On Mac it's under System Preferences --> Network --> Advanced --> Proxies.
I'm using a mac. I'm still not sure what I'm looking for here; is it this? In the box titled "bypass proxy settings for these hosts & domains," it says: "*.local, 169.254/16"
The site is zotero.org -- the steps let's you check whether you're seeing the correct certificate for Zotero. Malware, some security software, (as well as some proxy servers) can change the certificate and thus break the connection.
The certificate shows "Verified by: Let's Encrypt" which should be right, according to the information Zotero provides when following your link.
My Report-ID: 696698738
One last question stupid question: do I need to delete the installed version of Zotero from my computer before I install the new one?
Thank you for your support.