I made a scenario on east coastway, the driver service I made was from eastboune platform 2 to Brighton platform 7. I opened the scenario and spawned in, however, after pressing begin, the train immediately derailed. I tried restarting the game and Xbox but it keeps doing it and I cannot play the scenario.
Class 377, spring clear if that matters. Stopping at pole gate, glynde, lewes and Brighton. 4 other AI trains... freight from newhaven to lewes. Seaford to Brighton, brighton to Eastbourne, Brighton to seaford. They were all apart so they could all run perfectly.
The reason seems to be that your train is too long. The only way I can repeat the derailment is by choosing one of the longest 12-car formations of the class 377 listed in the menu. This is apparently 246m long when you choose it, which should be fine as the platform is 247m long. But when the scenario opens you're told that it's actually 269.3 yards long, which is 246.24metres. So it looks like you have 0.76 metres in hand. But if you go to the other end of platform 2, there are buffers positioned there which seem to take up around a metre. So the available platform length is shorter than it appears. They could have avoided this by offering one of the other longer platforms in scenario planner, but as it stands you need a shorter train.