Featured Image not working

Hi! Thanks for the plugin!

My problem: My featured image is not automatically loading the thumbnail I’ve put in when I choose a portfolio item. But: when I use the Customizer it does load.. I can’t add any images.

How it supposed to be (old site): https://magicdigital.partners/portfolio/jimmy-nelson-x-watch-your-time/

What is happening now: https://www.magicdigitalpartners.com/portfolio/jimmy-nelson-x-watch-your-time/

Thanks in Advance!

The page I need help with: [log in to see the link]