Hello,
Thanks for contacting us, and sorry for any inconvenience that might have been caused due to that.
I’ve tried checking the URL you’ve shared with us. But It seems like you’ve shared a wrong URL, as it’s returning 404 page. Here is a screenshot for your reference:

Can you please share the correct URLs with us? So that we can investigate the issue further for you.
Also, while checking few other pages/posts of your site, I’ve seen that the image for og:image property is returning 404 error code instead of loading an image. Please try fixing the 404 issue to see if that works for you.


Meanwhile, you can also try reading the guidelines regarding og:image property provided by LinkedIn to see if there’s anything that you should fix/improve.
Looking forward to helping you.
Thank you.
I undestood one part of the problem. The US IP were blocked by a security plugin.
Now it can recognize JPG image but not WEBP (what I use).
Hello,
LinkedIn doesn’t support webp format for og:image property. Which is why LinkedIn picking up the JPG image for og:image property.
For your reference, here is a quick comparison table of which image file formats are supported by different OGP-consuming platforms and apps.

As you can see in the comparison table above, the format jpeg, gif, or png are supported by most of the platforms, it’s better to use image file format only between jpeg, gif, or png.
Hope that helps, and please do not hesitate to let us know if you need our assistance with anything else.
Thank you.
Hello,
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.