It seems like customizing the font-size in the theme customizations panel generated an “invalid value” error that prevented saving the customizations. I found the following thread which didn’t reference any fix and asked about resolution. Typography Main Body Text
In the need to move on without waiting for a support answer, based upon my site being down (prior theme from another vendor did not support latest wordpress and php updates), I deactivated the theme and started over.
Prior to posting this new thread, as you requested, I looked at the scripts to see if I could see if there was a typo in one of the font-size values. I did find this, but I’m not sure if that’s the break or okay as typed … size vs sizeS.
As I was initially trying nearly every value to make the error go away within the theme’s customizer, I also changed the font-family field a few times. That also generated the “invalid value” response. After sending you my prior response, I noticed similar coding for face/faceS and style/styleS. Likely similar?