[Theme: Virtue] portfolio images showing up on portfolio post

Does anyone know how to get images to show up in the actual portfolio post?

https://jennymsanford.com/portfolio/thesis/
and
https://jennymsanford.com/portfolio/tbd-2/

My featured images for each page are 570×400 and shown here:
https://jennymsanford.com/projects/

Right now there is just a blank white space where the image should be and I can’t figure out why.

Thanks so much,
Christine