Fatal error: Uncaught Error: Call to undefined function storefront_html_tag_schema() in /web/htdocs/www.ilnumero1.it/home/wp-content/themes/storefront-child/header.php:10 Stack trace: #0 /web/htdocs/www.ilnumero1.it/home/wp-includes/template.php(704): require_once() #1 /web/htdocs/www.ilnumero1.it/home/wp-includes/template.php(653): load_template('/web/htdocs/www...', true) #2 /web/htdocs/www.ilnumero1.it/home/wp-includes/general-template.php(41): locate_template(Array, true) #3 /web/htdocs/www.ilnumero1.it/home/wp-content/themes/storefront/index.php(14): get_header() #4 /web/htdocs/www.ilnumero1.it/home/wp-includes/template-loader.php(77): include('/web/htdocs/www...') #5 /web/htdocs/www.ilnumero1.it/home/wp-blog-header.php(19): require_once('/web/htdocs/www...') #6 /web/htdocs/www.ilnumero1.it/home/index.php(17): require('/web/htdocs/www...') #7 {main} thrown in /web/htdocs/www.ilnumero1.it/home/wp-content/themes/storefront-child/header.php on line 10