Facebook og: image appears blank

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I currently having a problem with FB OG image on Feed status of https://3dl.aut.ac.nz/.
On profile status. This works fine. It appears that the bug is only happening on HOME(news feed page) status

Facebook Image Bug

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The site is built in wordPress. Normally I don’t stuck on og image on my previous works on WordPress.
On fb object debugger, the site has the correct og image and seems no problem at all.

I suspect its because im using secure server? (https://) Also same thing happens if I try, http://3dl.aut.ac.nz/ (http).

I investigated this issue and found another similar thread on stackoverflow thread. The thread says that this has been an issue with https. However, the facebook.com has a thumbnail when posted the link on FB status.

Is this issue has something to do with the server settings?

Any help will be greatly appreciated.

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4 comments

  1. Ran into the same problem myself. You’re trying to share from a secure site using Yoast’s WordPress SEO plugin. Unfortunately, it doesn’t properly handle the meta tags for secure images. Yoast includes:

    <meta property="og:image" content="https://image-url-here" />

    Facebook doesn’t like that, but there’s an easy fix, by adding:

    <meta property="og:image:secure_url" content="https://image-url-here" />

    I wrote up a blog post on how to hook into the plugin’s wpseo_opengraph_image hook to handle this automatically.

    Hope it helps.

  2. https/http should be no problem, i suspect that the image is just too broad. Always use the correct aspect ratio and size: https://developers.facebook.com/docs/sharing/best-practices#images

    Use images that are at least 1200 x 630 pixels for the best display on high resolution devices. At the minimum, you should use images that are 600 x 315 pixels to display link page posts with larger images.

    Try to keep your images as close to 1.91:1 aspect ratio as possible to display the full image in News Feed without any cropping.