Exception Summary Exception Description BadRequestExceptionWhen we sent a bad request (HTTP response code 400). CannotMessageUserExceptionWhen the user of the connected account cannot message a user. DiscordExceptionThis exception is always thrown whenever a request to Discord failed. MissingPermissionsExceptionWhen we are not allowed to perform an action (HTTP response code 403). NotFoundExceptionWhen something was not found (HTTP response code 404). RatelimitExceptionWhen we encounter a rate limit and ran out of retires. ReactionBlockedExceptionWhen the user of the connected account cannot add a reaction to a message a user has written. UnknownEmojiExceptionWhen the emoji that was sent, for example as reaction, is not an emoji Discord knows about. UnknownMessageExceptionWhen the message that was referenced, for example for adding a reaction to, is not a message Discord knows about (anymore).