Hello @ChristinaL524 ,
In your particular case, our Integrations team is recommending you call in to speak with them for advanced troubleshooting. Simply call our support line and ask to be transferred to them for assistance with your Facebook JMML app. Make sure to bring up the exact error message you received.
Otherwise I can also submit a case for you, but it could take up to 4 business days for a response from their team.
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