Browser warnings about visiting forum

My browser is telling me that the certificate for this website expired two days ago and that it is not safe to visit:

This server could not prove that it is www.forumforastral.com; its security certificate expired 2 days ago. This may be caused by a misconfiguration or an attacker intercepting your connection. Your computer's clock is currently set to Wednesday, August 11, 2021. Does that look right? If not, you should correct your system's clock and then refresh this page.

Proceed to www.forumforastral.com (unsafe)