I am not receiving Facebook messages
To retrieve Facebook messages in your inbox (after a connection error), reconnect Superchat with Facebook.
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Step-by-step guide:
Open your private Facebook profile
Go to your Settings, navigate to Business Integrations
Click on "view and edit" for Superchat
Tick all access permissions and select the corresponding Facebook page
Now go to Superchat
Proceed to your Settings
Navigate to Inboxes
Add Facebook again (do not delete!) to refresh the access permissions