My issue with registering for Second Wind Fate of the Vaal Private League

My issue: I was clearly notified that my request to participate in the Second Wind: Fate of the Vaal tournament had been accepted. However, I later received another notification saying that the tournament is now full and that I have been placed on the waiting list. What does this mean? I hope GGG can help me participate in Second Wind: Fate of the Vaal.