Aw :/
Could you post the entire error message? Maybe there's some other clues in it (like WHICH array is out of bounds)
Also, did you try updating the player_score script? When investigating I found an error where it uses the wrong variables in two places, it worked in previous versions. You could try updating that and see if it solves the problem (it's a really small change)
Instead of this:
effect_spawn_textpopup(x,y, ....
It should be this:
effect_spawn_textpopup(argument0,argument1, ...