Warning: require_once(ABSPATHWPINC/customize/class-wp-customize-themes-section.php): failed to open stream: No such file or directory in /home/helldorg/domains/muffin-recept.net/wp-includes/class-wp-customize-section.php on line 379

Fatal error: require_once(): Failed opening required 'ABSPATHWPINC/customize/class-wp-customize-themes-section.php' (include_path='.:/opt/remi/php56/root/usr/share/pear:/opt/remi/php56/root/usr/share/php:/usr/share/pear:/usr/share/php') in /home/helldorg/domains/muffin-recept.net/wp-includes/class-wp-customize-section.php on line 379