Can't publish website "Unable to connect"

[Vahalada]

Hi, Duncan. Can you help me solve this problem?

[duncan]

"Unable to connect" error message on macOS 10.9-10.12.1

This is still affecting some Sparkle users, so posting the solution here for future reference. On September 30th 2021 a 10 year old “root” certificate expired, this root certificate is owned by a popular certification authority called “Let’s Encrypt”. How this interacts with Sparkle: our website uses SSL for security, we use a server certificate signed by “Let’s Encrypt” Sparkle connects to our website during publishing for some (fully anonymous) server side processing the root certificate i…

[jol]

Response by developer is truncated !

[chrisMF]

Click on the “Unable to connect” … title for the whole article.