Whenever I try to start a boss battle, I get an empty battle screen. I tried enabling the skip combat debug option, but that encountered a similar problem.

Here's the error log for when I tried to battle the boss normally:

SCRIPT ERROR: makespecificgroup: Invalid get index 'bandits_easy_boss' (on base: 'Dictionary').

          At: res://src/Exploration.gd:1220
SCRIPT ERROR: buildenemygroup: Invalid get index '1' (on base: 'Nil').
          At: res://files/scripts/combat.gd:738
SCRIPT ERROR: start_combat: Invalid call. Nonexistent function 'values' in base 'Nil'.
          At: res://files/scripts/combat.gd:108

And here's from when I tried to circumvent the problem through using the skip combat debug option:

SCRIPT ERROR: interactive_message: Invalid get index 'slave_type' (on base: 'Dictionary').
          At: res://files/input_handler.gd:833

I have tried both methods several times with the exact same results, but all were on the same dungeon.