"The page has messages disabled in the settings. Please refer to Facebook page settings."
Incident Report for ManyChat
There is a known bug on Facebook's side currently which might affect messaging ability on certain ManyChat pages.

Please click this link to stay tuned for updates on the fix from Facebook's dev team: https://developers.facebook.com/support/bugs/429985290818592/

We'll update this incident with more information as well.
Posted 25 days ago. Jul 23, 2018 - 12:31 PDT
This incident affects: Message sending.