When I go to load passengers and the ramps connect I get an error message saying something along the lines of "passengerbus.py has caused couatl to restart and I get asked if I want to restart couatl. Refueling, cargo, pushback, etc all work. Any ideas what's going on? Also...I never see the passenger bus when I try to load passengers. I checked to see if the passenger bus had been unselected in the settings but that wasn't the case.