arrow crash

[00:13:27]: [string "../mods/workshop-488009136/modmain.lua"]:1981: attempt to concatenate local 'equipslot' (a nil value)
LUA ERROR stack traceback:
../mods/workshop-488009136/modmain.lua:1981 in (upvalue) postfn (Lua) <1980-1982>
   self =
      enabled = true
      focus_target = false
      highlight = false
      shown = true
      owner = 100416 - willow (valid:true)
      can_fade_alpha = true
      bgimage = Image - ../mods/workshop-488009136/images/tabimages/quiver_slot.xml:quiver_slot.tex
      focus_flow_args = table: 402C7838
      inst = 101544 -  (valid:true)
      focus = false
      focus_flow = table: 402C7540
      name = ItemSlot
      children = table: 402C76D0
      callbacks = table: 402C78D8
   equipslot = nil
   atlas = images/tabimages/quiver_slot.xml
   bgim = quiver_slot.tex
   owner = 100416 - willow (valid:true)
scripts/modutil.lua:85 in (field) _ctor (Lua) <83-86>
   self =
      enabled = true
      focus_target = false
      highlight = false
      shown = true
      owner = 100416 - willow (valid:true)
      can_fade_alpha = true
      bgimage = Image - ../mods/workshop-488009136/images/tabimages/quiver_slot.xml:quiver_slot.tex
      focus_flow_args = table: 402C7838
      inst = 101544 -  (valid:true)
      focus = false
      focus_flow = table: 402C7540
      name = ItemSlot
      children = table: 402C76D0
      callbacks = table: 402C78D8
   arg = nil
scripts/modutil.lua:92 in (upvalue) EquipSlot (Lua) <88-95>
   class_tbl = table: 394CE3C0
   arg = nil
   obj = ItemSlot
../mods/workshop-378962221/modmain.lua:168 in (upvalue) Inv_Rebuild_base (Lua) <136-275>
   self =
      hudcompass = Hud Compass
      shown = true
      actionstringtitle = Text -
      repeat_time = 0.2
      bg = ThreeSlice
      enabled = true
      in_pos = (0.00, 102.00, 0.00)
      actionstringtime = 10
      root = root
      bgcover = Image - images/hud.xml:inventory_bg_cover.tex
      inv = table: 402D6D88
      name = Inventory
      newbg = Image - ../mods/workshop-378962221/images/inventory_bg.xml:inventory_bg.tex
      focus_flow = table: 263F7620
      toprow = toprow
      out_pos = (0.00, 68.00, 0.00)
      autoanchor = WorldResetTimer
      callbacks = table: 263F72D8
      inst = 100626 -  (valid:true)
      focus = false
      equip = table: 402D6CC0
      children = table: 263F7580
      focus_flow_args = table: 263F7738
      focus_target = false
      selected_scale = 0.8
      bottomrow = toprow
      owner = 100416 - willow (valid:true)
      actionstring = actionstring
      can_fade_alpha = true
      parent = bottom_scale_root
      equipslotinfo = table: 263F76C0
      base_scale = 0.6
      openhint = Text -
      backpackinv = table: 402D6DD8
      hint_update_check = 1.9833332169801
      rebuild_pending = true
      actionstringbody = Text -
   inventory = table: 402A1948
   overflow = nil
   eslot_order = table: 402D6DB0
   y = 38
   num_slots = 24
   num_equip = 4
   total_w = 2023
   k = 4
   v = table: 23777648
../mods/workshop-375850593/modmain.lua:146 in (method) Rebuild (Lua) <145-148>
   self =
      hudcompass = Hud Compass
      shown = true
      actionstringtitle = Text -
      repeat_time = 0.2
      bg = ThreeSlice
      enabled = true
      in_pos = (0.00, 102.00, 0.00)
      actionstringtime = 10
      root = root
      bgcover = Image - images/hud.xml:inventory_bg_cover.tex
      inv = table: 402D6D88
      name = Inventory
      newbg = Image - ../mods/workshop-378962221/images/inventory_bg.xml:inventory_bg.tex
      focus_flow = table: 263F7620
      toprow = toprow
      out_pos = (0.00, 68.00, 0.00)
      autoanchor = WorldResetTimer
      callbacks = table: 263F72D8
      inst = 100626 -  (valid:true)
      focus = false
      equip = table: 402D6CC0
      children = table: 263F7580
      focus_flow_args = table: 263F7738
      focus_target = false
      selected_scale = 0.8
      bottomrow = toprow
      owner = 100416 - willow (valid:true)
      actionstring = actionstring
      can_fade_alpha = true
      parent = bottom_scale_root
      equipslotinfo =
[00:13:28]: [string "../mods/workshop-488009136/modmain.lua"]:1981: attempt to concatenate local 'equipslot' (a nil value)
LUA ERROR stack traceback:
    ../mods/workshop-488009136/modmain.lua:1981 in (upvalue) postfn (Lua) <1980-1982>
    scripts/modutil.lua:85 in (field) _ctor (Lua) <83-86>
    scripts/modutil.lua:92 in (upvalue) EquipSlot (Lua) <88-95>
    ../mods/workshop-378962221/modmain.lua:168 in (upvalue) Inv_Rebuild_base (Lua) <136-275>
    ../mods/workshop-375850593/modmain.lua:146 in (method) Rebuild (Lua) <145-148>
    scripts/widgets/inventorybar.lua:323 in (method) OnUpdate (Lua) <305-386>
    scripts/frontend.lua:689 in (method) Update (Lua) <552-704>
    scripts/update.lua:94 in () ? (Lua) <39-127>

[00:13:34]: Serializing minimap: session/5873557C9AE0ED11/KU_3u2ZvDSw_/minimap
[00:13:34]: Serializing user: session/5873557C9AE0ED11/KU_3u2ZvDSw_/0000000001
[00:13:35]: Force aborting...
[00:13:35]: [IPC] Unregistering handler for signal #00000714
[00:13:35]: [IPC] Unregistering handler for signal #00000794
[00:13:35]: [IPC] Unregistering handler for signal #000006CC
[00:13:35]: [IPC] Unregistering handler for signal #00000708
[00:13:35]: [IPC] Unregistering handler for signal #0000078C
[00:13:35]: [IPC] Unregistering handler for signal #000002E8
[00:13:35]: [IPC] Unregistering handler for signal #000007DC
[00:13:35]: [IPC] Unregistering handler for signal #000007D0
[00:13:35]: [IPC] Unregistering handler for signal #00000320
[00:13:35]: [IPC] Unregistering handler for signal #00000510