Having fun running the Descent into Avernus mod for FG Unity. This is my first time using Unity and trying out the LOS features

One problem: Started them off in the Elfsong Tavern and while my players can open and close doors just fine, they cannot move through them. Whether clicking to drag or using the arrow keys, their tokens will "Stick" at the edge of the door and not be able to proceed. The doors aren't locked, but this prevents them from moving about the map.

Could it be that the walls were drawn too thick on the map and it's not allowing a token on a grid to move through? What is the recommended solution for this?