Facebook Permission Expires
Your Facebook permission in Boxify can expire when Facebook invalidates the connection token (a security key) due to a security-related event. When this happens, Boxify loses the ability to send messages or receive data from your Page.

How to fix it
Section titled โHow to fix itโ-
Log out of the Boxify system.
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Ask the person with the Facebook Page admin role to log in to Boxify using the Login with Facebook button.

See also: