Custom URL ability gone

It has been a few months since I did anything with my webpage. I tried adding an image to a post and found out the option to add a custom URL link is gone. I am missing the attachment display settings for media files. (step 4 here https://www.templatemonster.com/help/wordpress-how-to-link-a-post-image-to-a-custom-url.html) How can I restore this?

I’m using theme “fotography”.

I had been using portfolios where each image was linked to a custom URL. This is no longer working on my old pages and I can’t recreate it because I don’t have the option to add custom URLs to media files anymore.

Any ideas?

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