I think it's also important to note:
Even if they do come out with a justifiable reason for why he was not allowed to attend the event, calling him manic, crazy or saying he is having a manic episode (as he claimed) because he tweeted out his frustrations after not being allowed into the event, especially when they are aware of his past mental struggles, is really weird from their management if true.
he also said something along the lines of being told that he is not allowed to go out to places with the friends he met, despite also not being allowed to enter the event, so essentially trying to force him to stay in his hotel alone after he flew all that way to be with the team. Again if all true, it's completely understandable why he's acting in this way.