FYI - It seems that something broke for some browsers when the SSL certs were installed on the forums. Homepage works, but the forums don’t. Safari seems to work but Firefox and Edge and IE11 and don’t. Firefox is just a white page. Edge/IE11 complains about TLS not being secure enough on the site, so I’m guessing you may have some ciphers enabled that are insecure.
I made a change to the nginx conf and I think the forums are working on Firefox, can anyone test Firefox and Chrome and let me know if things are working for you?