Failed to call hook 'OnServerInitialized' on plugin 'PublicQuarryLock v1.0.15' (NullReferenceException: )

at (wrapper managed-to-native) UnityEngine.Component.GetComponentFastPath(UnityEngine.Component,System.Type,intptr)

at UnityEngine.Component.GetComponent[T] () [0x00021] in <745c4d442eef4e08b35b5975d62d89d1>:0

at Oxide.Plugins.PublicQuarryLock.OnEntitySpawned (MiningQuarry quarry) [0x0011c] in <a41171a00bcd4b6b8095fb32adc67bf1>:0

at Oxide.Plugins.PublicQuarryLock.OnServerInitialized () [0x0016e] in <a41171a00bcd4b6b8095fb32adc67bf1>:0

at Oxide.Plugins.PublicQuarryLock.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00631] in <a41171a00bcd4b6b8095fb32adc67bf1>: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

Updated the plugin with additionnal null check.  Not sure how or why this error is occuring because each quarry must have a fuel container and a hopper container, and the error indicate it is missing.

Did this error occured after a map wipe ?  server update ? oxide update ? or just a server restart ?