If you have recently implemented the Cookie Consent solution into your website and have had difficulty with any facebook feed embeds, try adding the pre-defined Facebook SDK Service.
Log in, click into your license, click Edit Policy Details for the Cookie Policy and Consent Tool, go to the final page, click "add new service", wait for Services to load, type in and select Facebook SDK. Click 'submit' and test in a fresh incognito window (click 'accept all' to ensure the feed loads).