I have created a schedule, and the game loads, and the schedule loads on the editor, but it crashes when i try to go past day 2 in a new game. Does anyone know what this could be?

The error wouldn't be on day 3 with this error but rather the last day available to make entries. Check what is the last date you can enter your horses in when you are on day 2 and then the day after that is where the problem is.