Creating new game causes crash!

I started a new nature mage and the game crashes on the sand giant


############################################################################################
FATAL ERROR in
action number 1
of Key Press Event for E-key Key
for object obj_tutorial_creature:

trying to index a variable which is not an array
at gml_Script_scr_AddToBeastiary
############################################################################################

stack frame is
gml_Script_scr_AddToBeastiary (line 0)
gml_Object_obj_tutorial_creature_KeyPress_69

This is happening with every class :’(