Some things are being sent to discord properly; mainly just joins/quits. Chat works from discord to ingame but not from ingame to discord.

Whenever someone chats in game I get this error in the console:

Failed to call hook 'OnPlayerChat' on plugin 'Rustcord v3.2.1' (ArgumentException: oldValue is the empty string.)
at System.String.ReplaceInternal (System.String oldValue, System.String newValue) [0x00016] in <eae584ce26bc40229c1b1aa476bfa589>:0
at System.String.Replace (System.String oldValue, System.String newValue) [0x0000e] in <eae584ce26bc40229c1b1aa476bfa589>:0
at Oxide.Plugins.Rustcord.OnPlayerChat (BasePlayer player, System.String message, ConVar.Chat+ChatChannel channel) [0x00122] in <920aa84f2bd544d4a7fe41ccf93129fc>:0
at Oxide.Plugins.Rustcord.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00e25] in <920aa84f2bd544d4a7fe41ccf93129fc>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <60c318df79ed41688ea59335e48d61ad>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <9882f28dc2204b4dba514a9ad18f5042>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <9882f28dc2204b4dba514a9ad18f5042>:0

/bug and /report messages work, and so do joins/disconnects, and the "server is back online!" message when you turn the server on. chatting from discord to ingame works, but not from ingame to discord.  Deathnotes (to discord) is not working. None of the bradley/cargo/heli spawns or supply drop notifications etc are working. 

Not sure what to do.

I've exactly the same.

Just logged in to say I am having the same issue. After messing with configs for an hour, I figured I'd check here :)

DeathNotes are not logging to discord.