I keep getting the following error

Error while running event on_tick (ID 0)
Callable only on trains
stack traceback:
add-loader/control.lua:29: in function 'clean_loaders'
add-loader/control.lua:104: in function <add-loader/control.lua:91>

this seem to happen when there is a train in the station but I can't be sure as I cant get the game to load it worked fine till I went to play the scenario and it works fine the rest of the time as I play single player with it and no issues so far
this is in a scenario single player