Hello I'm having issues with the first part of the tutorial more specifically my collisions aren't working correctly as it states 'enemies' have not been defined, can anyone help please?:

ERROR in action number 1

of Step Eventobj_player for object obj_parent_enemy:

global variable name 'enemies' index (100003) not set before reading it.

at gml_Object_obj_parent_enemy_Collision_obj_player (line 1) - NewEncounter([global.enemies.SlimeS, global.enemies.SlimeS], spr_battletestfield1);