I couldn't figure out why I couldn't get into or see invitations to certain groups on gather. I realized it was because I had my Adult content selection as no. I changed it to yes so I could join these groups. I forgot I did this and clicked on an article written by one of my favorite people on gather as I love the work they do. OOOps, It was an article on something I didn't want to read and should have been able to tell by the title it was something I didn't want to read. If you do what I did remember you will be getting articles that are very adult content that you may not want to view.
I put my Adult content back to no, if I don't join your group, it is because I live in PG world, except in the privacy of my bedroom!