With Firefox I couldn't get in at all:
With Microsoft Edge I got the same error but it allowed me to proceed.
With Internet Explorer I got the same error but it also allowed me to proceed.
Did Not Connect: Potential Security Issue
Firefox detected an issue and did not continue to forums.bmwmoa.org. 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.
What can you do about it?
forums.bmwmoa.org has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.
Your computer clock is set to 5/25/2019. Make sure your computer is set to the correct date, time, and time zone in your system settings, and then refresh forums.bmwmoa.org.
If your clock is already set to the right time, the website is likely misconfigured, and there is nothing you can do to resolve the issue. You can notify the website’s administrator about the problem.
With Microsoft Edge I got the same error but it allowed me to proceed.
With Internet Explorer I got the same error but it also allowed me to proceed.