NullReferenceException at AddCovalenceCommandSolved
(13:48:22) | PrivateMessages was compiled successfully in 1883ms
(13:48:22) | Unloaded plugin PrivateMessages v1.1.0 by MisterPixie
(13:48:22) | Failed to initialize plugin 'PrivateMessages v1.1.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String[] commands, System.String[] perms, Oxide.Core.Libraries.Covalence.CommandCallback callback) [0x0000a] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String[] commands, System.String callback, System.String[] perms) [0x00014] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String command, System.String callback, System.String perm) [0x00012] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Plugins.PrivateMessages.Init () [0x00036] in <223cce9b1dd4413fa8891f6a53855959>:0 
  at Oxide.Plugins.PrivateMessages.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00140] in <223cce9b1dd4413fa8891f6a53855959>: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.CSPlugin.HandleAddedToManager (Oxide.Core.Plugins.PluginManager manager) [0x00043] in <4452f821def6406d834e4149849fe7ea>:0
(13:48:22) | Unloaded plugin PrivateMessages v1.1.1 by MisterPixie
(13:48:23) | No previous version to rollback plugin: PrivateMessages
Deleted previous version configuration file and deleted my edited language file, new version still won't load.
Now looking

Merged post

Unload the plugin & remove the config file.
Worked, unloaded previous version, deleted lang/config files and then new version was able to load.
Awesome!

Failed to initialize plugin 'PrivateMessages v1.1.1' (NullReferenceException: Object reference not set to an instance of an object)

at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String[] commands, System.String[] perms, Oxide.Core.Libraries.Covalence.CommandCallback callback) [0x0000a] in <4452f821def6406d834e4149849fe7ea>:0

at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String[] commands, System.String callback, System.String[] perms) [0x00014] in <4452f821def6406d834e4149849fe7ea>:0

at Oxide.Core.Plugins.Plugin.AddCovalenceCommand (System.String command, System.String callback, System.String perm) [0x00012] in <4452f821def6406d834e4149849fe7ea>:0

at Oxide.Plugins.PrivateMessages.Init () [0x00036] in <24019cea771b405ba4584c082af62b98>:0

at Oxide.Plugins.PrivateMessages.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00140] in <24019cea771b405ba4584c082af62b98>: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.CSPlugin.HandleAddedToManager (Oxide.Core.Plugins.PluginManager manager) [0x00043] in <4452f821def6406d834e4149849fe7ea>:0

(20:34:10) | Unloaded plugin PrivateMessages v1.1.1 by MisterPixie

Yep.. you need to unload your plugin & remove the config file. Then you reload the plugin again.
Locked automatically