I have not requested any changes, and I am aware of the many updates between versions 2.2 and 2.9.

“…please install our latest version separately…”

My original post had been asking how I can install it separately. It explained that had been my intention — so I could compare 2.9 on a staging site (using plugin ‘SP Staging’, because I’m no developer) with 2.2 on the live site — but WordPress won’t install two identically named themes. So I can’t install it separately, to make this comparison!

Please be clear. Does ‘Please install our latest version separately then compare and proceed‘ actually mean ‘Yes, your only option is to overwrite the old version, see how much of your live site becomes broken, and attempt repairs/rebuilds in real time.’?

Unfortunately, the install had in fact been adjacent to my needs, because instead of the theme being installed on the staging site instead of the live site as I had requested, it was installed — and activated — on only the live site…which now has a problem, and I’ve been unable to resolve it: when I click on any individual portfolio item, the theme loads a blank page (desktop view), or (mobile view) it loads a page that says:

There has been a critical error on this website. Learn more about troubleshooting WordPress.

How can this be repaired?

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

Thank you, yes, you may deactivate plugins for testing. My site has been backed up.