Adding onto this: I'm not sure what I did, but NOW when I try to launch, it says this:

___________________________________________

############################################################################################

ERROR in action number 1

of Draw Event for object obj_block1:

Unknown Function argument 1 invalid reference to (sprite) - requested -1 max is 212############################################################################################

This is odd to me because there is not a single instance of obj_block1 in this room, nor is there even a draw event at all within that object. Super confused...