This is the error I got when I looked in the log:
Lua Error: /mod/addons/Vulcus/superload/mod/class/GameState.lua:360: bad argument #1 to 'pairs' (table expected, got nil)
At [C]:-1
At [C]:-1 pairs
At /mod/addons/Vulcus/superload/mod/class/GameState.lua:360 old_on_added_to_level
At /mod/resolvers.lua:950 check
At /mod/class/Actor.lua:7607 check
At /engine/Zone.lua:782 addEntity
At /mod/class/generator/actor/Random.lua:53 generateOne
At /engine/generator/actor/Random.lua:127 regenFrom
At /engine/generator/actor/Random.lua:49 generate
At /engine/Zone.lua:1133 newLevel
At /engine/Zone.lua:989 getLevel
At /mod/class/Game.lua:1156 base_changeLevelReal
At /mod/addons/beholder-cont/superload/mod/class/Game.lua:6 changeLevelReal
At /mod/class/Game.lua:955 changeLevel
At /mod/class/Game.lua:2207
At /engine/KeyBind.lua:243