I have DiscordCore successfully setup for: Receiving in-game messages in Discord. The DiscordDeaths/DeathNotes integration works too, it goes into Discord. I also have the DiscordPlayers, and DiscordPresence setup and working.

I cannot seem to register. In-game I type /discord join RyanFromRust#0341 and I receive the in-game message with the code, and I get the bot’s DM in Discord to me. When I respond back with the code in the DM, nothing happens except an error in the console:

(18:45:02) | [Discord Extension] An error has occured: Response: An exception has occurred during an OnMessage event.
(18:45:02) | [Discord Core] WebSocketError: System.NullReferenceException: Object reference not set to an instance of an object
  at Oxide.Ext.Discord.WebSockets.SocketListner.SocketMessage (System.Object sender, WebSocketSharp.MessageEventArgs e) [0x007e2] in :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 
An exception has occurred during an OnMessage event.
(18:45:02) | [Discord Extension] Attempting to reconnect to Discord...
(18:45:07) | [Discord Extension] Discord socket opened!
(18:45:07) | [Discord Extension] Your bot was found in 1 Guilds!
(18:45:08) | [Discord Core] Discord connected to server: [SPQR] ROME 5X!

The console error message is the same if I respond to the bot's DM in Discord with either a correct or incorrect pin.