Cannot see Image options for Open Graph Image Selector

My blog post has 3 images. When I go to Blog Post Template settings, and try to select an image for Open Graph Image, there is no option of image being displayed. Check image below for reference.

Can you please guide, what am I missing?

Here is my site Read-Only: Webflow - Sachin's Website - Evermore

This is probably too late for you @Sachin_Sharma, but I had a similar problem.

Looks like it needs a CMS Image Field to work, and does not work with Multi Image Field either…