The error occurs while the GuardedCrate event is active and the reload server command is executed.

:octagonal_sign: <t:1748401202:t>
```cs
Failed to call internal hook 'OnEntityKill' on plugin 'GuardedCrate v2.0.5' [304634108] (Object reference not set to an instance of an object)
at void Oxide.Plugins.GuardedCrate+GuardedCrateInstance.UnlockCrates() in C:/rustserver/server/MyServer/carbon/plugins/GuardedCrate.cs:line 1334
at void Oxide.Plugins.GuardedCrate+GuardedCrateInstance.EventComplete(BasePlayer player) in C:/rustserver/server/MyServer/carbon/plugins/GuardedCrate.cs:line 1291
at void Oxide.Plugins.GuardedCrate+GuardedCrateInstance.OnGuardKilled(ScientistNPC scientist, BasePlayer player) in C:/rustserver/server/MyServer/carbon/plugins/GuardedCrate.cs:line 1543
at void Oxide.Plugins.GuardedCrate.OnEntityKill(ScientistNPC scientist) in C:/rustserver/server/MyServer/carbon/plugins/GuardedCrate.cs:line 789
at object Oxide.Plugins.GuardedCrate.InternalCallHook(uint hook, object[] args) in GuardedCrate.cs/Internal:line 136
```

looks like you are using a older version of the plugin please update to the latest, it requires an config, lang and data file wipe to update.