DST Scale Inventory mod crash

[00:00:58]: [string "../mods/workshop-497584917/modmain.lua"]:29: attempt to index field 'newbg' (a nil value)
LUA ERROR stack traceback:
../mods/workshop-497584917/modmain.lua:29 in (method) LoadExtraSlots (Lua) <14-35>
   self =
      IsEditing = function - scripts/widgets/widget.lua:130
      __tostring = function - scripts/widgets/widget.lua:610
      OnTextInput = function - scripts/widgets/widget.lua:99
      MoveToFront = function - scripts/widgets/widget.lua:48
      Rebuild = function - ../mods/workshop-497584917/modmain.lua:42
      CursorDown = function - scripts/widgets/inventorybar.lua:479
      OnShow = function - scripts/widgets/inventorybar.lua:1059
      GetParent = function - scripts/widgets/widget.lua:183
      GetLocalPosition = function - scripts/widgets/widget.lua:273
      Show = function - scripts/widgets/widget.lua:242
      UpdatePosition = function - scripts/widgets/inventorybar.lua:1059
      GetCursorSlot = function - scripts/widgets/inventorybar.lua:518
      SetClickable = function - scripts/widgets/widget.lua:428
      IsEnabled = function - scripts/widgets/widget.lua:173
      GetTooltipPos = function - scripts/widgets/widget.lua:373
      HookCallback = function - scripts/widgets/widget.lua:308
      Cancel = function - scripts/widgets/inventorybar.lua:965
      AddEquipSlot = function - scripts/widgets/inventorybar.lua:103
      GetFocusChild = function - scripts/widgets/widget.lua:511
      GetDeepestFocus = function - scripts/widgets/widget.lua:499
      SetFocusChangeDir = function - scripts/widgets/widget.lua:487
      SetOnLoseFocus = function - scripts/widgets/widget.lua:479
      OnRawKey = function - scripts/widgets/widget.lua:92
      StartUpdating = function - scripts/widgets/widget.lua:387
      UpdateCursor = function - scripts/widgets/inventorybar.lua:837
      GetWorldPosition = function - scripts/widgets/widget.lua:259
      SetMaxPropUpscale = function - scripts/widgets/widget.lua:292
      IsVisible = function - scripts/widgets/widget.lua:82
      GetStr = function - scripts/widgets/widget.lua:596
      OnItemUnequip = function - scripts/widgets/inventorybar.lua:1051
      ScaleTo = function - scripts/widgets/widget.lua:145
      GetTooltip = function - scripts/widgets/widget.lua:361
      KillAllChildren = function - scripts/widgets/widget.lua:217
      SetFocusFromChild = function - scripts/widgets/widget.lua:539
      OnItemEquip = function - scripts/widgets/inventorybar.lua:1045
      OnEnable = function - scripts/widgets/inventorybar.lua:597
      SetCanFadeAlpha = function - scripts/widgets/widget.lua:418
      OnNewActiveItem = function - scripts/widgets/inventorybar.lua:987
      ClearFocus = function - scripts/widgets/widget.lua:522
      OnBuild = function - scripts/widgets/inventorybar.lua:981
      Nudge = function - scripts/widgets/widget.lua:267
      SetScaleMode = function - scripts/widgets/widget.lua:296
      SetTooltipColour = function - scripts/widgets/inventorybar.lua:647
      Refresh = function - ../mods/workshop-497584917/modmain.lua:37
      Hide = function - scripts/widgets/widget.lua:236
      FollowMouse = function - scripts/widgets/widget.lua:436
      Enable = function - scripts/widgets/widget.lua:192
      UpdateCursorText = function - scripts/widgets/inventorybar.lua:651
      SetHoverText = function - scripts/widgets/widget.lua:614
      GetInventoryLists = function - scripts/widgets/inventorybar.lua:414
      OnGainFocus = function - scripts/widgets/widget.lua:469
      SetFocus = function - scripts/widgets/widget.lua:562
      GetDescriptionString = function - scripts/widgets/inventorybar.lua:632
      IsDeepestFocus = function - scripts/widgets/widget.lua:26
      GetTooltipColour = function - scripts/widgets/widget.lua:349
      ClearFocusDirs = function - scripts/widgets/widget.lua:483
      OnUpdate = function - scripts/widgets/inventorybar.lua:306
      _ctor = function - scripts/modutil.lua:119
      StopUpdating = function - scripts/widgets/widget.lua:391
      SetRotation = function - scripts/widgets/widget.lua:288
      SetVA
[00:00:58]: [string "../mods/workshop-497584917/modmain.lua"]:29: attempt to index field 'newbg' (a nil value)
LUA ERROR stack traceback:
    ../mods/workshop-497584917/modmain.lua:29 in (method) LoadExtraSlots (Lua) <14-35>
    ../mods/workshop-497584917/modmain.lua:44 in (method) Rebuild (Lua) <42-45>
    scripts/widgets/inventorybar.lua:324 in (method) OnUpdate (Lua) <306-387>
    scripts/frontend.lua:688 in (method) Update (Lua) <551-703>
    scripts/update.lua:94 in () ? (Lua) <39-127>