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Abby BeckerAbby Becker 

Facebook plugin iframe error

<div aura:id="error_message"></div>
        <div class="body-wrapper">
            <iframe src="https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2FFirstNationalBank%2F&amp;tabs=timeline&amp;width=450&amp;height=1200&amp;small_header=false&amp;adapt_container_width=true&amp;hide_cover=false&amp;show_facepile=true" width="450" height="1200" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true" allow="encrypted-media"></iframe>
        </div>

We have a lightning component that houses my company's Facebook page via a plugin within an iframe. From time to time, we get this error. I just want to confirm that this is an issue with Facebook and not the component or Salesforce platform... 

User-added image
ShirishaShirisha (Salesforce Developers) 
Hi Abby,

Greetings!

Seems like this is the customized error message which is coming from the lightning component or the classes which are being invoked by the Iframe url.This confirms that this error is from the Facebook since the components are from facebook as you mentioned.

Kindly mark it as best answer if it helps so that it can help others in the future.

Warm Regards,
Shirisha Pathuri