Unmatching security certificate on Koinly forums is driving my antivirus program crazy

I get the following message from my antivirus software (Bitdefender) literally every minute that I am on the discuss.koinly.io forum. Please fix this.

firefox.exe attempted to establish a connection relying on an unmatching security certificate to discourse-longpoll.koinly.io. We blocked the connection to keep your data safe since the used certificate was issued for a different web address than the targeted one.