[Theme Horse Support Team]

Hi Patricia,
Yes that is correct. Your clean retina pro theme must be updated
Use it

/*
 Theme Name:   Clean Retina Pro Child
 Theme URI:    https://www.themehorse.com
 Description:  Theme Horse Child Theme
 Author:       Sunil Jung Chhetri
 Author URI:   http://example.com
 Version:      1.0.0
 Tags:         light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready
 Text Domain:  clean-retina-child
*/

@import url("../clean-retina-pro/style.css");

/* =Theme customization starts here
-------------------------------------------------------------- */ 

Thank you!