Cant play with a specific character
It's the strangest thing, I can log in as any other character on my account except one. I thought it might be the channel so I logged into a different one with no luck. Then I thought it might be the map so I rebirthed to Tir from the character select screen. That didn't work. I'm not that knowledgable about this stuff so that's where the experiment ended. Any ideas would be greatly appreciated.
It's possible that through some sort of in-game or (more likely) out of game modding you corrupted your character. I doubt it's a ban because that would prevent you from logging into the account. Submit a ticket and see what happens.