Xbox Series X Flying Scotsman Broken

can’t get the flying Scotsman moving literally will not go. The brakes are off and it won’t go and it says the reverser is off when it’s at 75%

 

Okay Update I’ve managed to get it working but just to loco itself. I’m gonna have to play around with the formation designer to get it to work with the Mk 1 carriages it seems to hate nine carriages at the moment it just doesn’t go

 

If they are vacuum braked coaches you need to open the small injector

 

The Scotsman is mainly Air brakes, but as MichaelPlant stated, you will need to prep it for Vacuum brakes, check the coaches on the end at the door it will be written if they are vacuum or air or both.
This is from TSW4