I keep getting the same and it affects DiscordCore

[Discord Core] WebSocketError: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException (System.ExceptionResource resource) [0x0000b] in <567df3e0919241ba98db88bec4c6696f>:0
at System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () [0x00013] in <567df3e0919241ba98db88bec4c6696f>:0
at System.Collections.Generic.List`1+Enumerator[T].MoveNext () [0x0004a] in <567df3e0919241ba98db88bec4c6696f>:0
at System.Linq.Enumerable+WhereListIterator`1[TSource].MoveNext () [0x0004e] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at Oxide.Ext.Discord.DiscordClient.CallHook (System.String hookname, Oxide.Core.Plugins.Plugin specificPlugin, System.Object[] args) [0x0008c] in <a141f1996e934ec597a4fcdd8f3a7ede>:0
at Oxide.Ext.Discord.WebSockets.SocketListner.SocketMessage (System.Object sender, WebSocketSharp.MessageEventArgs e) [0x00c14] in <a141f1996e934ec597a4fcdd8f3a7ede>:0
at WebSocketSharp.Ext.Emit[TEventArgs] (System.EventHandler`1[TEventArgs] eventHandler, System.Object sender, TEventArgs e) [0x00009] in <7126fb4f5c5b40029458a4f975f98d13>:0
at WebSocketSharp.WebSocket.messagec (WebSocketSharp.MessageEventArgs e) [0x00003] in <7126fb4f5c5b40029458a4f975f98d13>:0​

Same issue for me too

Help @Tricky Can you figure this out for us ?

I get this message when Discord Core starts or I reload it.

(00:29:37) | Loaded plugin Discord Core v0.14.6 by MJSU
(00:29:39) | Saved 27,187 ents, cache(0.03), write(0.01), disk(0.00).
(00:29:39) | Saving complete
(00:29:42) | [Discord Extension] Discord socket opened!
(00:29:42) | [Discord Extension] Your bot was found in 1 Guilds!
(00:29:42) | [Discord Core] Connected to bot: Cataclysm-Bot
(00:29:42) | [Discord Core] Discord connected to server: Cataclysm
(00:29:42) | [Discord Extension] An error has occured: Response: An exception has occurred during an OnMessage event.
(00:29:42) | [Discord Core] WebSocketError: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
  at System.ThrowHelper.ThrowInvalidOperationException (System.ExceptionResource resource) [0x0000b] in <437ba245d8404784b9fbab9b439ac908>:0 
  at System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () [0x00013] in <437ba245d8404784b9fbab9b439ac908>:0 
  at System.Collections.Generic.List`1+Enumerator[T].MoveNext () [0x0004a] in <437ba245d8404784b9fbab9b439ac908>:0 
  at System.Linq.Enumerable+WhereListIterator`1[TSource].MoveNext () [0x0004e] in <351e49e2a5bf4fd6beabb458ce2255f3>:0 
  at Oxide.Ext.Discord.DiscordClient.CallHook (System.String hookname, Oxide.Core.Plugins.Plugin specificPlugin, System.Object[] args) [0x0008c] in <618cbb3cd1f24a338ef71fa504209e7a>:0 
  at Oxide.Ext.Discord.WebSockets.SocketListner.SocketMessage (System.Object sender, WebSocketSharp.MessageEventArgs e) [0x00c5c] in <618cbb3cd1f24a338ef71fa504209e7a>:0 
  at WebSocketSharp.Ext.Emit[TEventArgs] (System.EventHandler`1[TEventArgs] eventHandler, System.Object sender, TEventArgs e) [0x00009] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at WebSocketSharp.WebSocket.messagec (WebSocketSharp.MessageEventArgs e) [0x00003] in <7126fb4f5c5b40029458a4f975f98d13>:0 
An exception has occurred during an OnMessage event.
(00:29:42) | [Discord Extension] Attempting to reconnect to Discord...
(00:29:47) | [Discord Extension] Discord socket opened!
(00:29:47) | [Discord Extension] Your bot was found in 1 Guilds!
(00:29:47) | [Discord Core] Connected to bot: Cataclysm-Bot
(00:29:47) | [Discord Core] Discord connected to server: Cataclysm