Post-update Slider Revolution problem

Greetings.

I updated my X theme, updated Cornerstone.

I have a custom functions.php. I checked for updates to the functions.php; it seems the ONLY line that changed is a reference to Slider Revolution.

I copied that line over into my modified functions.php file and uploaded it.

Slider Revolution no longer works.

(Yes, I know I should use a Child theme, but I’ve been doing it this way for years now, and it’s worked so far.)

Any clues? Thanks!

Site: https://www.gracejudson.com
I’ll put an admin login into a private note.