I solved this, so please ignore.
Hi,
(Edited because I figured out the problem….)
I’m trying to make three columns the same height, responsively. I copied the javascript from another post (https://community.theme.co/forums/topic/make-columns-same-height-in-cornerstone/), gave the columns a unique class, then modified the jquery to select the class, and added the jquery to the custom js using the gear in the upper right corner. After after finding a typo in my code, it worked perfectly. Thanks folks!
Page: https://codeificant.com/testimonials3/
Login credentials, if you need, will be in private post.
Thank you!