As we can see, you have modified our original theme’s code and break this functionality. Please, remove your customizations or upload our theme original files.
1. i remove all content from functions.php in child folder and replace it with dummy content.
2. i remove all other extra content from child theme
3. i uninstall all plugins, just plugins from dummy content
right sidebar are not working. coud you send me a tipp to will be able to pinpoint and eliminate the fault.
No, we meant that you changed our original parent theme files. Most likely the file inc/template-tags.php. Just reinstall the theme to be sure that you have all original PHP files from our theme.