Our hosting partner Rocket Ivy has discovered the cause of an error that may cause the MyStyle Customizer to not operate correctly on some sites (never loads), that came from a DIVI theme update in their new “Performance” tab.
Here is a link to the blog post describing the error and the fix to turn off the deferring of jQuery Migrate:
https://rocketivy.com/fix-for-sites-with-divi-and-jquery-migrate-errors-in-console/
Rocket Ivy is our #1 trusted partner for hosting and website maintenance.