@marga: The way you have define child theme is incorrect. Your child theme style.css should be as below.
/*
Theme Name: Catch Box Child Theme
Theme URI: http://catchthemes.com/themes/catchbox/
Author: Catch Themes Team
Author URI: http://catchthemes.com
Template: catch-box
Description: Child theme of Catch Box WordPress Theme
Version: 1.0
*/
/* =Import Parent theme CSS
-------------------------------------------------------------- */
@import url("../catch-box/style.css");
/* =Child Theme Custom CSS
-------------------------------------------------------------- */