Error while running event PickerDollies::on_player_removed (I D 75)
__stdlib__/stdlib/event/event.lua:368:
__stdlib__/stdlib/event/player.lua:78: attempt to index field 'players' (a nil value)
stack traceback:
[C]: in function error
__stdlib__/stdlib/event/event.lua:368: in function 'dispatch_event'
__stdlib__/stdlib/event/event.lua:438: in function - <__stdlib__/stdlib/event/event.lua:396>

Error while running event Ultracube::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function "__index"
__Ultracube__/scripts/cube_search.lua:338: in function 'cube_search_transport_lines'
__Ultracube__/scripts/cube_search.lua:546: in function 'cube_search_local'
__Ultracube__/scripts/cube_search.lua:901: in function 'update'
__Ultracube__/scripts/cube_fx.lua:550: in function 'tick'
__Ultracube__/control.lua:317: in function <__Ultracube__/control.lua:315>

Error while running event Ultracube::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function "__index"

__Ultracube__/scripts/cube_search.lua:338: in function 'cube_search_transport_lines'
__Ultracube__/scripts/cube_search.lua:546: in function 'cube_search_local'
__Ultracube__/scripts/cube_search.lua:901: in function 'update'
__Ultracube__/scripts/cube_fx.lua:550: in function 'tick'
__Ultracube__/scripts/control.lua:317: in function <__Ultracube__/scripts/control.lua:315>

You probably have incompatible mods.