Fatal error: Uncaught Error: Undefined constant "HEADER" in /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-content/themes/sparkling/inc/custom-header.php:56 Stack trace: #0 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/class-wp-hook.php(287): sparkling_header_style('') #1 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #2 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/general-template.php(2884): do_action('wp_head') #4 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-content/themes/sparkling/header.php(30): wp_head() #5 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/template.php(723): require_once('/home/httpd/vho...') #6 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/template.php(672): load_template('/home/httpd/vho...', true) #7 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/general-template.php(41): locate_template(Array, true) #8 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-content/themes/sparkling/404.php(8): get_header() #9 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-includes/template-loader.php(106): include('/home/httpd/vho...') #10 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-blog-header.php(19): require_once('/home/httpd/vho...') #11 /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/index.php(17): require('/home/httpd/vho...') #12 {main} thrown in /home/httpd/vhosts/hasiba-gmbh.com/thesandwich.ch/wordpress/wp-content/themes/sparkling/inc/custom-header.php on line 56