Nostalrius Begins - Quality wow vanilla realm (1.12)

It is about acception to a guild. When I get the invitation to a guild I click "accept", but notning happens. There is no inscription above my head. I tried to reload many times, but in vain. I asked to invite again, but I was said that I was a member of the guild. And I even wrote /gquit , but it was an aswer that I wasn't a guild member.

^ What Pottu said, but I will add, the limit is 321, so ask the person inviting you to check that first.