I tried to add the line at line 238 per the error message here:
___________________________________________
############################################################################################
ERROR in
action number 1
of Create Event
for object obj_init:
DoAdd :1: illegal array use
at gml_Object_obj_init_Create_0 (line 238) - global.spells[e_spell_types.heal, e_spell_stats.min_value] = 8 + global.pl_stats[e_pl_stats.level];
############################################################################################
gml_Object_obj_init_Create_0 (line 238)
so I commented out 238 and added your line from below in it's place (straight up copy/paste):
global.spells[e_spell_types.heal][e_spell_stats.min_value] instead of global.spells[e_spell_types.heal, e_spell_stats.min_value]
I got the following error in the compiling, not in a prelaunch window:
Object: obj_init Event: Create at line 238 : Assignment operator expected