Hello, I run a carbon server and am getting this error in my server console. What can i do to fix this?

Failed to call internal hook 'OnEntityKill' on plugin 'CustomVendingSetup v2.14.3' [304634108] (Object reference not set to an instance of an object)
at VendingController Oxide.Plugins.CustomVendingSetup+VendingMachineManager.GetController(NPCVendingMachine vendingMachine) in /home/container/carbon/plugins/CustomVendingSetup.cs:line 2799
at void Oxide.Plugins.CustomVendingSetup+VendingMachineManager.HandleVendingMachineKilled(NPCVendingMachine vendingMachine) in /home/container/carbon/plugins/CustomVendingSetup.cs:line 2784
at void Oxide.Plugins.CustomVendingSetup.OnEntityKill(NPCVendingMachine vendingMachine) in /home/container/carbon/plugins/CustomVendingSetup.cs:line 239
at object Oxide.Plugins.CustomVendingSetup.InternalCallHook(uint hook, object[] args) in CustomVendingSetup.cs/Internal:line 217