I have no idea if this game is still being worked upon and being regularily updated. But the game is always crashing when the gig has just ended, the screen freezes and the game turns itself off.

Any tips would be appreciated, since I really like this game so far!

___________________________________________
############################################################################################
FATAL ERROR in
action number 1
of Step Event0
for object obj_performance:

Unable to find any instance for object index '21' name 'obj_song_rhythm'
at gml_Object_obj_performance_Step_0
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Object_obj_performance_Step_0 (line -1)

Help please!