Byblos theme update has crashed my site

I’ve tried to install the Byblos theme update several times and each time it has crashed my site. I posted a couple of days ago on this problem and the suggested solution of loading a fresh copy of Byblos didn’t work either. I’m wondering if the problem has something to do with updating only Byblos and the solution might be to check for updates for it’s parent theme?

I did not modify any code other than, perhaps, what a plug-in might do as I’m a complete novice at this and only built a site for my business.

Thsnks