I get this when carrying out some of the logged commands, have JUST installed the plugin and had not changed the config file from its default state. I think the commands that correspond to these errors are: ent auth / ent who / ent lock / ent unlock / teleportpos / teleport.

17:55 [Error] Failed to call hook 'OnServerCommand' on plugin 'AdminLogger v2.3.2' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.AdminLogger.EntityLogging (ConsoleSystem+Arg arg) [0x00498] in <838c85e6259a4e3f936f97f0cfc2cc25>:0 
  at Oxide.Plugins.AdminLogger.OnServerCommand (ConsoleSystem+Arg arg) [0x00314] in <838c85e6259a4e3f936f97f0cfc2cc25>:0 
  at Oxide.Plugins.AdminLogger.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00269] in <838c85e6259a4e3f936f97f0cfc2cc25>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d09a1f46ca2f4432811bcfe45ad13c7b>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cf88a28c7fb44d36890d85a78331cc9d>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cf88a28c7fb44d36890d85a78331cc9d>:0 

A couple of other events, the first.. Ive no idea.. the second is GiveAll

11:14 [Error] Failed to call hook 'OnServerCommand' on plugin 'AdminLogger v2.3.2' (FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.)
  at System.Text.StringBuilder.AppendFormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x000ff] in <fb001e01371b4adca20013e0ac763896>:0 
  at System.String.FormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x00023] in <fb001e01371b4adca20013e0ac763896>:0 
  at System.String.Format (System.String format, System.Object[] args) [0x00020] in <fb001e01371b4adca20013e0ac763896>:0 
  at Oxide.Plugins.AdminLogger.Lang (System.String key, System.String id, System.Object[] args) [0x0000e] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.AdminLogger.Log (System.String filename, System.String key, System.Object[] args) [0x0001b] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.AdminLogger.EventsLogging (ConsoleSystem+Arg arg) [0x0021f] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.AdminLogger.OnServerCommand (ConsoleSystem+Arg arg) [0x000c8] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.AdminLogger.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00269] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d09a1f46ca2f4432811bcfe45ad13c7b>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cf88a28c7fb44d36890d85a78331cc9d>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cf88a28c7fb44d36890d85a78331cc9d>:0 


11:17 [Error] Failed to call hook 'OnServerCommand' on plugin 'AdminLogger v2.3.2' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.AdminLogger.GiveItemLogging (ConsoleSystem+Arg arg) [0x0001f] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.AdminLogger.OnServerCommand (ConsoleSystem+Arg arg) [0x0028c] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.AdminLogger.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00269] in <e8ed281804e34678ab969a7581d53ec6>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d09a1f46ca2f4432811bcfe45ad13c7b>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cf88a28c7fb44d36890d85a78331cc9d>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cf88a28c7fb44d36890d85a78331cc9d>:0 
11:17 [Warning] [Tebex Donate] Attempting to log all stored connection events...
11:17 [Warning] [Tebex Donate] Successfully logged all stored connection events!

Thanks!

The first one (in you second message) is for event calling (like airdrop, heli and so on).

Could you try unload the plugin, delete config file (oxide/config/AdminLogger.json) and lang file (oxide/lang/en/AdminLogger.json).

Then reload the plugin and try those commands again.

Merged post

I have released an update, check if everything works now for you.