Runtime in saving.dm

[valzargaming]

[01:18:52] Runtime in saving.dm,62: bad output
proc name: BuildVarDirectory (/map_storage/proc/BuildVarDirectory)
src: /map_storage (/map_storage)
call stack:
/map_storage (/map_storage): BuildVarDirectory(map_saves/2.sav (/savefile), Valzargaming (/client), 1)
/map_storage (/map_storage): BuildVarDirectory(map_saves/2.sav (/savefile), Valzargaming (/mob/observer/ghost), 1)
/map_storage (/map_storage): BuildVarDirectory(map_saves/2.sav (/savefile), the grass (161,152,2) (/turf/floor/grass), 1)
/map_storage (/map_storage): BuildVarDirectory(map_saves/2.sav (/savefile), Forest (/area/caribbean/nomads/forest), 1)
/map_storage (/map_storage): BuildVarDirectory(map_saves/2.sav (/savefile), the small crab (/mob/living/simple_animal/crab/small), 1)
/map_storage (/map_storage): BuildVarDirectory(map_saves/2.sav (/savefile), the beach (99,27,2) (/turf/floor/beach), 1)
/map_storage (/map_storage): Save World()
/datum/controller/gameticker (/datum/controller/gameticker): savemap()
start persistence loop()