To reverse the situation, it is important that the user with the admin permission for the Facebook page makes the following settings:
Why doesn't my Facebook Messenger channel work?
The Facebook Messenger channel can stop working if the token has expired or even if the user does not have the admin permission for the account.
To reverse the situation, it is important that the user with the admin permission for the Facebook page makes the following settings:
To reverse the situation, it is important that the user with the admin permission for the Facebook page makes the following settings: