Fatal error: Uncaught Error: Call to undefined function is_shop() in /var/www/vhosts/dddj.at/httpdocs/wp-content/themes/betheme/header-shop.php:101 Stack trace: #0 /var/www/vhosts/dddj.at/httpdocs/wp-includes/template.php(770): require_once() #1 /var/www/vhosts/dddj.at/httpdocs/wp-includes/template.php(716): load_template() #2 /var/www/vhosts/dddj.at/httpdocs/wp-includes/general-template.php(48): locate_template() #3 /var/www/vhosts/dddj.at/httpdocs/wp-content/themes/betheme/single-template.php(11): get_header() #4 /var/www/vhosts/dddj.at/httpdocs/wp-includes/template-loader.php(106): include('...') #5 /var/www/vhosts/dddj.at/httpdocs/wp-blog-header.php(19): require_once('...') #6 /var/www/vhosts/dddj.at/httpdocs/index.php(17): require('...') #7 {main} thrown in /var/www/vhosts/dddj.at/httpdocs/wp-content/themes/betheme/header-shop.php on line 101