Crash in battle 0.9.11

Was holding down the action button to go through a battle when the interface went all grey and the battle started going unusually seemingly my own creatures were attacking themselves, but I have so much of the feedback turned off I couldn’t exactly tell, anyway, I let go of the action button (remapped from e to numpad9) to press up in the menu and then this crash happened:


############################################################################################
ERROR in
action number 1
of Key Press Event for S-key Key
for object obj_creaturebattlemenu:

unable to add a number to string############################################################################################
gml_Object_obj_creaturebattlemenu_KeyPress_83 (line 16)