Not sure if this will ever be seen but I will give it a shot:
NotSupportedException: IL2CPP does not support marshaling delegates that point to instance methods to native code. The method we're attempting to marshal is: DiscordPresence.PresenceManager::ReadyCallback
at DiscordPresence.DiscordRpc.Initialize (System.String applicationId, DiscordPresence.DiscordRpc+EventHandlers& handlers, System.Boolean autoRegister, System.String optionalSteamId) [0x00000] in <00000000000000000000000000000000>:0
at DiscordPresence.PresenceManager.OnEnable () [0x00000] in <00000000000000000000000000000000>:0
Not sure if this will ever be seen but I will give it a shot: