To understand what I’m talking about, please view as a site visitor. For example, this link directs to a portfolio item, yet only shows a blank page.

I’m aware the portfolio items are listed within the front-end, and this is what your previous message showed an image of. However, when the items are visited on the live site, clicking on any portfolio item results in the aforementioned blank views, as pictured here: https://prnt.sc/10yszfb