Facebook og: image appears blank
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
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.
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.