server crash

I don't know what it is, but got it this morning
[Error] Failed to call hook 'OnPlayerLootEnd' on plugin 'ShoppyStock v2.0.8' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Ext.CarbonAliases.LUI.SendUi (BasePlayer player) [0x00000] in <8d5eac3d7c2543cb851b260642ab9512>:0 
  at Oxide.Plugins.ShoppyStock.UpdateCurrencyDepositUI (BasePlayer player, ItemContainer cont) [0x00123] in <b12570b3355c4146b8a686e18ca8b444>:0 
  at Oxide.Plugins.ShoppyStock+<>c__DisplayClass120_0.<SpawnAndOpenContainer>b__3 () [0x00017] in <b12570b3355c4146b8a686e18ca8b444>:0 
  at (wrapper delegate-invoke) <Module>.invoke_void()
  at ItemContainer.MarkDirty () [0x00022] in <44b37ac32d304ed58c19aa1a111d2b5c>:0 
  at ItemContainer.Remove (Item item) [0x0008c] in <44b37ac32d304ed58c19aa1a111d2b5c>:0 
  at Item.SetParent (ItemContainer target) [0x00012] in <44b37ac32d304ed58c19aa1a111d2b5c>:0 
  at Item.RemoveFromContainer () [0x00009] in <44b37ac32d304ed58c19aa1a111d2b5c>:0 
  at Item.MoveToContainer (ItemContainer newcontainer, System.Int32 iTargetPos, System.Boolean allowStack, System.Boolean ignoreStackLimit, BasePlayer sourcePlayer, System.Boolean allowSwap) [0x005f9] in <44b37ac32d304ed58c19aa1a111d2b5c>:0 
  at Oxide.Plugins.ShoppyStock.OnPlayerLootEnd (PlayerLoot loot) [0x00120] in <b12570b3355c4146b8a686e18ca8b444>:0 
  at Oxide.Plugins.ShoppyStock.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001aa] in <b12570b3355c4146b8a686e18ca8b444>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <112d89ea5d3348c8b949af0ab1a866d2>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <112d89ea5d3348c8b949af0ab1a866d2>:0 

It happens when players rapidly open/close the deposit UI.

Environment: Oxide 2.0.4138 / CSharp 2.0.4149, CarbonAliases 1.1.3, Unity 2022.3.41f1.

The server crashed immediately after this error.