Hi Jo,
Thanks for getting in touch with us.
We checked your website here and the image is showing up fine:
https://developers.facebook.com/tools/debug/
With that said, we did get this issue which might be the reason you are not seeing the image when you are actually sharing the website on Facebook:
Can't validate SSL Certificate. Either it is self-signed (which will cause browser warnings) or it is invalid.
Please talk to your web host and see if they have a solution for you.
If the issue persists even after that, do not hesitate to let us know.
As far as Rank Math is concerned – the og:image
tag is being correctly added to your pages which is sufficient for Facebook to pull your images.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
That’s a great help. Although the SSL looked as if it was setup and working, I have discovered that this was not the case. The hoster tested it and advised they saw an unusual issue and reinstalled it. Problem solved. Thank you for your quick response and helpful advice.
Hello Jo,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.