I have been mentioned in a post, in a forum group, but when I click the event, I get "error, you are not a member of this group". So how can I see the post?!

I would comment the user who pinged you. Let them know they pinged you/a group to a place you can't see and ask them what group it was in! Then see if you can join it. xD

Thanks, I thought of it after I post it, story of my life, always think after... :D

It happens to all of us. c:

LOL, thanks :)

I actually got this all the time when I was a member of ASP (adult subeta players). I never contacted anyone about it and never ended up getting involved in the cult. I'm a part of Wizarding now and I don't have that problem with their ping group, though.

It's actually not a problem with that individual ping group. It happens when someone makes a post inside a group forum, pinging a different group that you're not in