FB Lead Ad Scenario Error


Every second or the third day we get the below mentioned error from make and the scenario is stopped and we loose deliver of leads flowing in.

“Error validating access token: The session has been invalidated because the user changed their password or Facebook has changed the session for security reasons. (190, OAuthException)”

No changes to the FB account was made on our end. We have tried to reach Make Support and have not heard back from anyone in the last 15+ days.

Please help! TIA