"Error: Join by Invite Only" after being invited to guild

I got an in-game invite to join a guild and I clicked yes in the mail to join the guild. This took me to the Join Guild screen where I see that guild and a few others. The guild shows status of “Invite Pending”, but when I click the Join button I get “Error: Join by Invite Only”.

This was resolved after the 3rd time of getting the invite code in in-game mail. Let me know if a dev wants any other details.

Kind of old thread, but this has happened several times in my guilds. @Cyrup, do you mind adding this to the known issues list so someone will look at it?