I get this message when I start a new game, when I continue a game, the message doesn't come up. It wasn't like this before, I started it today and then... T.T What does that mean? And how can I solve this?

This is a toughy, but I can say that if its giving you a syntax error and not saying what line, its probably because you have a 'call script' in an event. check the player's starting map for any events that use a call script, if so, make sure it doesn't have any errors, if not, then I can't say for sure.