This means that you likely do not have the appropriate license for the thumbnail image, GIF, or still video image.

Example: You seem to be using an image without appropriate rights from the individuals who are displayed in or have rights to the material.
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How To Fix
​Make sure that you provide us with the appropriate permissions for your third-party content.
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To learn more about this rejection reason, click here.

To learn how to fix and resubmit your campaign or campaign item, click here.
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