NullReferenceException on both 3.06 and 3.07

So today i saw that this plugin was updated to 3.0.7, so i did updated my server, had a bunch of error spaming.
Now as i swaped version, i got this error.

Failed to call hook 'OnItemAction' on plugin 'RustRewards v3.0.6' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.RustRewards.OnItemAction (Item item, System.String action, BasePlayer player) [0x0002f] in <307c8cf49ec049ec82c080ecd968198c>:0

  at Oxide.Plugins.RustRewards.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00551] in <307c8cf49ec049ec82c080ecd968198c>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <60c318df79ed41688ea59335e48d61ad>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0
[DEBUG] Reload requested for plugin which is already loading: RustRewards
RustRewards was compiled successfully in 2522ms
Unloaded plugin RustRewards v3.0.6 by Steenamaroo
Failed to call hook 'OnServerInitialized' on plugin 'RustRewards v3.0.7' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.RustRewards.OnServerInitialized () [0x007fb] in <d0cb33a439e24dfdbf9c29314a5c6d73>:0

  at Oxide.Plugins.RustRewards.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0025e] in <d0cb33a439e24dfdbf9c29314a5c6d73>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <60c318df79ed41688ea59335e48d61ad>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0
Calling 'OnServerInitialized' on 'RustRewards v3.0.7' took 3067ms
Loaded plugin RustRewards v3.0.7 by Steenamaroo
Calling 'OnEntityTakeDamage' on 'RustRewards v3.0.7' took average 3068ms

Whatever action made in game for a reward there is always this error poping but the call is different on each action.

Failed to call hook 'OnDispenserBonus' on plugin 'RustRewards v3.0.7' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.RustRewards.OnDispenserBonus (ResourceDispenser d, BasePlayer player, Item i) [0x00000] in <d0cb33a439e24dfdbf9c29314a5c6d73>:0 at Oxide.Plugins.RustRewards.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x004db] in <d0cb33a439e24dfdbf9c29314a5c6d73>:0 at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <60c318df79ed41688ea59335e48d61ad>:0 at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0 at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0

Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.RustRewards+<OnDispenserGather>c__AnonStorey4.<>m__0 () [0x00017] in <d0cb33a439e24dfdbf9c29314a5c6d73>:0 at Oxide.Core.OxideMod.OnFrame (System.Single delta) [0x00051] in <50629aa0e75d4126b345d8d9d64da28d>:0