On 2021-10-08 09:45, Grigory Shamov wrote:

Resolving muug.ca (muug.ca)... 208.81.1.244, 2605:e200:3:4::244 Connecting to muug.ca (muug.ca)|208.81.1.244|:443... connected. ERROR: cannot verify muug.ca's certificate, issued by ‘/C=US/O=Let's Encrypt/CN=R3’: Issued certificate has expired.

Are you using OpenBSD, or LibreSSL, by any chance? Let's Encrypt made an "interesting" decision about how to deal with their cross-chaining cert expiring, and it breaks LibreSSL's certificate chain validation.

Meanwhile, I'll check into it anyway.

-Adam