Here is the first part: 

 [Oxide] 15:36 [Error] Failed to call hook 'OnEntityDeath' on plugin 'DeathNotes v6.2.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.DeathNotes.GetDeathMessage (Oxide.Plugins.DeathNotes+DeathData data) [0x00031] in <bff384c516b3432ab666608aaf32775d>:0 
  at Oxide.Plugins.DeathNotes.OnEntityDeath (BaseCombatEntity victimEntity, HitInfo hitInfo) [0x000d6] in <bff384c516b3432ab666608aaf32775d>:0 
  at Oxide.Plugins.DeathNotes.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00159] in <bff384c516b3432ab666608aaf32775d>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0
(14:36:31) | [Oxide] 15:36 [Info] Unloaded plugin Death Notes v6.2.0 by LaserHydra​

Merged post

Not sure why but deleting the json and .cs file for the 4th time did the trick xD