DEMO Super Mario: All-Star Attack! (Version 0.8.9 Demo)

[WasabiCatto]

Whenever I try to open the game, this message shows up: File not found: GMFMODSimple.dll In directory: C:\Users\mango\Documents\Super Mario Bros. All-Star Attack
When I click ok, this message shows up:
___________________________________________
ERROR in
action number 2
of Other Event: User Defined 13
for object obj_SYSTEM:

Error defining an external function.

Do you know why this is happening?

Have you extracted all the files?

"shy guys are wall plugs confirmed" - Vitiman on Club Saturn Ex