PC Tried To Climb Up Stairs On Db Br 612, Got Teleported To The Roof

I was at Freiberg, and I left the train to take a screenshot. Then when I tried to climb up the stairs to board the train again, I got teleported up to the roof and can't figure out how to get down, this is really annoying as I had been driving for 30 minutes. If anyone knows how to get down please tell me.