(NullReferenceException: Object reference not set to an instance of an object)

This is spamming on EVERY second on my console:

Failed to call hook 'OnCustomNpcTarget' on plugin 'Sputnik v1.3.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.Sputnik+SputnikClass.IsSputnikAgressive () [0x0000f] in <c7ab2492c57048c0b571fd4cf2ede8a1>:0 
  at Oxide.Plugins.Sputnik.OnCustomNpcTarget (ScientistNPC npc, BasePlayer player) [0x0007c] in <c7ab2492c57048c0b571fd4cf2ede8a1>:0 
  at Oxide.Plugins.Sputnik.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001b6] in <c7ab2492c57048c0b571fd4cf2ede8a1>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <87ce9ac9776a48658bc55eae6debe38b>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <18d4f19bbc844191b11ed9e69284d09b>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <18d4f19bbc844191b11ed9e69284d09b>:0 
Failed to call hook 'OnCustomNpcTarget' on plugin 'Sputnik v1.3.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.Sputnik+SputnikClass.IsSputnikAgressive () [0x0000f] in <c7ab2492c57048c0b571fd4cf2ede8a1>:0 
  at Oxide.Plugins.Sputnik.OnCustomNpcTarget (ScientistNPC npc, BasePlayer player) [0x0007c] in <c7ab2492c57048c0b571fd4cf2ede8a1>:0 
  at Oxide.Plugins.Sputnik.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001b6] in <c7ab2492c57048c0b571fd4cf2ede8a1>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <87ce9ac9776a48658bc55eae6debe38b>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <18d4f19bbc844191b11ed9e69284d09b>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <18d4f19bbc844191b11ed9e69284d09b>:0 

Changed Status from Pending to Work in Progress

The code has been completely rewritten, so I can't say 100% that this error is gone, but I think I got rid of it.

Changed Status from Work in Progress to Closed