Thanks for the bump on the post! It reminded me about this particular issue.
For anybody experiencing issues, I've isolated the problem. It seems to be related to a 3rd-party filter list called "EasyPrivacy". This seems to be enabled by default on some versions of uBlock/uBlock Origin. For now, the only recommendation I have is to disable that particular filter list. For whatever reason, they are blocking a number of different forum functions (most of which are only accessible to mods anyway).
I'll be reaching out to them to resolve this, but it may take a while. Will first need to figure out just how many things they have blocked.