Artifact realm bug

This is depth 2 of an artifact realm. There was no boss and no exit.

It happened again after I used another key and used the shrine in level 2 to go to level 3.

Found the problem, thanks!

This now happens instead when I go to the next floor:


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

Variable obj_roomchanger.nether_realm(101110, -2147483648) not set before reading it.
at gml_Object_obj_roomchanger_KeyPress_69
############################################################################################

Found it, thanks!