So I have to start a new game to get an access to tavern? In my current save I've already defeated everybody in the tournament and I can't get into the tavern. I've repeated fight with Scarlet hoping it'll trigger some script but no
Normally you can access the tavern after the fight 3 so if you have a save at that time, you should be able to access it
Otherwise, I recommend to wait next update (which include a save)