Ok so recently i have been getting this error with only one of my discords that i have tested it in. 
So i know its nothing to do with the bot as it works on at least 3 others. 

Why would it only affect one and not the rest?

Any help would be greatly appreciated. 

11.10.2018 20.24.20|Error|WebSocket.messagec|System.ArgumentNullException: Value cannot be null.
                          Parameter name: source                                                    31fps, 3h44m40s
                            at System.Linq.Enumerable.TryGetFirst[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate, System.Boolean& found) [0x0000d] in <839a3cb835c04d14aeb58d83bb7bc4bd>:0
                            at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) [0x00000] in <839a3cb835c04d14aeb58d83bb7bc4bd>:0
                            at Oxide.Ext.Discord.WebSockets.SocketListner.SocketMessage (System.Object sender, WebSocketSharp.MessageEventArgs e) [0x00f02] in <a5b2f558069e40f7b83de551a4df08a5>:0
                            at WebSocketSharp.Ext.Emit[TEventArgs] (System.EventHandler`1[TEventArgs] eventHandler, System.Object sender, TEventArgs e) [0x00009] in <8fe7f8665ff548909c2f26d557e5093a>:0
                            at WebSocketSharp.WebSocket.messagec (WebSocketSharp.MessageEventArgs e) [0x00003] in <8fe7f8665ff548909c2f26d557e5093a>:0
[Discord Ext] An error has occured: Response: An exception has occurred during an OnMessage event.

I have been gettiong this message for several months with no response from Discord ext dev, Please any help would be greatly appreciated. 

11.10.2018 20.24.20|Error|WebSocket.messagec|System.ArgumentNullException: Value cannot be null.
                          Parameter name: source                                                    
                            at System.Linq.Enumerable.TryGetFirst[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate, System.Boolean& found) [0x0000d] in <839a3cb835c04d14aeb58d83bb7bc4bd>:0
                            at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) [0x00000] in <839a3cb835c04d14aeb58d83bb7bc4bd>:0
                            at Oxide.Ext.Discord.WebSockets.SocketListner.SocketMessage (System.Object sender, WebSocketSharp.MessageEventArgs e) [0x00f02] in <a5b2f558069e40f7b83de551a4df08a5>:0
                            at WebSocketSharp.Ext.Emit[TEventArgs] (System.EventHandler`1[TEventArgs] eventHandler, System.Object sender, TEventArgs e) [0x00009] in <8fe7f8665ff548909c2f26d557e5093a>:0
                            at WebSocketSharp.WebSocket.messagec (WebSocketSharp.MessageEventArgs e) [0x00003] in <8fe7f8665ff548909c2f26d557e5093a>:0
[Discord Ext] An error has occured: Response: An exception has occurred during an OnMessage event.