I've been getting this error every so often

Failed to call hook 'OnFuelConsume' on plugin 'XPerience v1.8.920' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.XPerience.OnFuelConsume (BaseOven oven, Item fuel, ItemModBurnable burnable, BaseOven+IndustrialSlotMode IndustrialMode) [0x0023d] in <0fcad88f07194872bc0b321111af10d7>:0 
  at Oxide.Plugins.XPerience.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x04405] in <0fcad88f07194872bc0b321111af10d7>: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 <15f61ddda771464d8246ebdce8ff4811>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <15f61ddda771464d8246ebdce8ff4811>:0 

6 hours ago, Azami1213 said:

OnFuelConsume (BaseOven oven, Item fuel, ItemModBurnable burnable, BaseOven+IndustrialSlotMode IndustrialMode)

Something in the oven/industrial oven that is being used as fuel is not being recognized. Are you using any other plugins that add custom burnable items for fuel?