Send Failed/Person Unavailable Error

When messaging is disabled on your Facebook page, users will see an error message when interacting with your Messenger channel


When you open Messenger to talk to the bot, you’ll see error messages like these coming from Messenger:


Enable messaging

Make sure you've set your page to allow messages. Go to your page Settings > General > Messages and make sure 'Allow people to contact my Page privately by showing the Message button.' is checked.