What Is The Issue?
When syncing an ad to the publisher, you may receive the following error:
"Invalid Parameter: Page Post can't be used: This type of page post can't be promoted in an ad".
What Causes The Issue?
If a poll ad is published and you try to promote the ad, you will receive this error as Facebook no longer supports boosting polls. The ad can still exist, however, it cannot be promoted.
How To Fix The Issue
Remove the boost from the poll ad.