It would of been wonderful to come to a preserved content with no bugs but here we are again. So the trouble is the following. There are no country flags for the DLC and also the tutorial once you do it once you cannot move forward to the next because it restarts itself. When you come back to that DLC after you changed to another the same tutorial is started, you have to painfully exist and manually select another. This happened on Tees Valley DLC but more could also experience this issue.
You must be thinking about TSW or TSW2 This is the forum for Train Simulator 2021 Go here https://forums.dovetailgames.com/forums/trainsimworld/ and report faults