Tried creating a child theme through various plugins, but the error always was that the CSS was not loaded.
So following the official guide - Child Themes « WordPress Codex
What I know is, create a new folder for the child theme, and create a style.css file:
/*
Theme Name: Tyche child
Theme URI: http://example.com/
Description: Child Theme
Author: John Doe
Author URI: http://example.com
Template: tyche
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Tags: light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready
Text Domain: tyche-child
*/
I think I have found the solution. Maybe very straightforward, but it works for me. I have used the plugin Child Theme Configurator. Unlike default wordpress themes, Tyche child css did not work. So I copied whole folder ‘assets’ into the Tyche child directory next to style.css and functions.php. It works!