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Facebook / Twitter previews are not working

Leandro Silva Dec 16, 2018 11:30AM CET

Hello again,

I'm having problems with sharing our website on social media (facebook and twitter).

After sharing the website link (using the seo/share settings in the homepage) I get the following results:
Facebook: it appears the website link / description and an "old" image that we added some time ago instead of the new one.
Twitter: nothing appears.

I already cleared the cache and tested in different browsers, but the same issue happens.
Then I used the and I get the following warning:

"The 'fb:app_id' property should be explicitly provided, Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in url when open the share dialog."

How to fix this?

Thank you once again!

Best regards,
Leandro Silva

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Jon Dec 18, 2018 08:09AM CET Semplicelabs Agent

Hey Leandro!

Sorry to hear of the issue.

Hmm, yes this issue usually has to do with some sort of image caching issue on the backend of either Wordpress or your hosting panel, or perhaps in Yoast itself (Semplice just uses the Yoast plugin functionality to set the share images).

I would check to ensure you are using correct image dimensions and a jpg image format (dimensions are listed on the Share tab of each page or project in Semplice). Lastly, try setting the share image in the Pages are of Wordpress instead of the Sharing page in Semplice, as an alternative method. There’s a Yoast section at the bottom of the Wordpress page editor where you can set share images.


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Leandro Silva Dec 19, 2018 10:15AM CET
Hi Jon,

Thanks for the reply.

Yes, both images have the correct dimensions and format.
We also tried to add the facebook image on Yoast section (at the bottom of the Wordpress page), but unfortunately without success.

Best regards,
Leandro Silva
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Jon Dec 20, 2018 05:14AM CET Semplicelabs Agent

Hey Leandro!

Sorry to hear you’re experiencing this issue.

If you would like to send a private email to with your login info and a link to this thread, we can check your settings and troubleshoot for you. Please include all the requested information as we can’t troubleshoot without it:

Website URL:
Admin Link:

IMPORTANT: If you’re creating a temporary login for us to use (recommended) please be sure to give us administrator rights so we can properly diagnose your issue. If you’re not creating a temporary login, be sure to update your password once this issue is resolved.

We’ll watch for your email and look into this for you!

Thanks and talk soon,

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