Unable to find a valid entity

I keep getting this report in game whenever I look at a box and use the /box command, If i try any other commands like box near I get the following error in rcon.

Can you help with this at all please?

Also getting this error repeatedly in RCON

Failed to call hook 'OnLootEntity' on plugin 'BoxLooters v0.3.5' (NullReferenceException: Object reference not set to an instance of an object)

at Oxide.Plugins.BoxLooters.OnLootEntity (BasePlayer looter, BaseEntity entity) [0x000ec] in <6e7ee51fbcc543bbb8dedbc2937f7150>:0

at Oxide.Plugins.BoxLooters.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00267] in <6e7ee51fbcc543bbb8dedbc2937f7150>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <23ba99f131254889867c71f0bd137b1d>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <157a94ee66ab4a7991faecd1eb84be3b>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <157a94ee66ab4a7991faecd1eb84be3b>:0