It seems when you have your Guild listed on the in game Guild Finder you are unable to Invite Members normally. I tried to day and the button did not bring up the window. When I unchecked the List Guild box the button started working again. I did test this with another guild member to make sure it was not an addon I had.
This confirmed as an issue, not sure if it’s a bug or not. I had another guild ask me this morning about this. So if you list your Guild in the Guild Finder in Cataclysm your Invite Member button will quit working until your Delist your Guild. If you have the same issue mention below so we can let Blizzard know.
Bob - GM of Disorderly Conduct
Just want to Bump this so Blizzard sees it. Is this a bug??
The /ginv command also doesn’t work when your guild is listed, my guild found this out a couple of days ago.
Once we delisted, both the button and command worked.