Cannot login to character, game crashes every time

I'm getting an error whenever I try to log in with my character, I can log in on all my old characters just fine but on this new character my game crashes and I get a message:

"Fatal Error in Metadata/Monsters/LeagueIncursionNew/MiniBosses/SoulCoreQuadrillaBoss/SoulCoreQuadrillaMinion@36: Number of shared states is different on client and server! Delta:2"

I'm playing a Spirit Walker with the Quadrilla Sergeant boss tame and I'm assuming that seems to be the culprit due to the error message. My character is stuck in a map and I cannot log in to play it.

I was able to fix it by logging into the game at hideout by holding control when selecting my character.

Thanks for the advice. But I'm afraid that won't work for my character. He's still in Act 3 of the story and doesn't have full access to the hideout. He's also already in town outside the instance. I think the Molten Chamber map got glitched when I exited through the portal, and it's locked the entire game. So there's nowhere for him to reset. The only way I can continue playing is if someone from the development team logs into my account and unlocks the character. Thanks again for taking the time to try and help me.