I got it on ubuntu/firefox it says something like
Firefox detected an issue and did not continue to forum.awesystems.info. The website is either misconfigured or your computer clock is set to the wrong time.
It’s likely the website’s certificate is expired, which prevents Firefox from connecting securely.
….
Websites prove their identity via certificates, which are valid for a set time period. The certificate for forum.awesystems.info expired on 11/3/2025. Error code: SEC_ERROR_EXPIRED_CERTIFICATE