I also see this error quite frequently:
(09:46:17) | Failed to call hook 'CanDropActiveItem' on plugin 'LifeSupport v1.1.3' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.LifeSupport.CanDropActiveItem (BasePlayer player) [0x00000] in <47c4a92d5f774fc2afa6f9a7ae83ea18>:0
at Oxide.Plugins.LifeSupport.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002bd] in <47c4a92d5f774fc2afa6f9a7ae83ea18>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <70dc8de1abd4423db5f501c6845edf22>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ac41dd3599754d448b8c218b34645820>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ac41dd3599754d448b8c218b34645820>:0
(09:46:17) | Failed to call hook 'OnPlayerDeath' on plugin 'LifeSupport v1.1.3' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.LifeSupport.OnPlayerDeath (BasePlayer player, HitInfo hitInfo) [0x00049] in <47c4a92d5f774fc2afa6f9a7ae83ea18>:0
at Oxide.Plugins.LifeSupport.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00288] in <47c4a92d5f774fc2afa6f9a7ae83ea18>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <70dc8de1abd4423db5f501c6845edf22>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ac41dd3599754d448b8c218b34645820>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ac41dd3599754d448b8c218b34645820>:0