I have done some research by my self (I know, that is against the license to decompile the game (I used undertale mod tool cuz why not), but I also do not know gml that much) but what I was able to find was that to_warn in your script Object_meaning_of_the_game_Create_0 it calls the function
room_goto(to_warn)
Of which calls to_warn, which I could not find any reference to. If you have any idea what is wrong, please tell me. replacing the targeted room with something else like "TheMeaning" allows the script continue as normal, although the game promptly closes as instructed to by the next line.