When syncing objects in the Marin Social platform, you may encounter the following sync error:
This error message means that the Promoted Object (the pixel event) has not yet been selected. For Conversion Campaigns, the Promoted Object needs to be selected during the ad set creation. The Promoted Object defines which Pixel Event Facebook needs to optimise the campaign for.
To fix the issue, you'll need to select the Promoted Object. Here's how to do that: