Fatal error: Uncaught Error: Call to undefined function is_cart() in /home/customer/www/shop.funstkunst.de/public_html/wp-content/plugins/woocommerce-germanized/includes/class-wc-gzd-checkout.php:188 Stack trace: #0 /home/customer/www/shop.funstkunst.de/public_html/wp-includes/class-wp-hook.php(307): WC_GZD_Checkout->maybe_remove_shopmark_filters('') #1 /home/customer/www/shop.funstkunst.de/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #2 /home/customer/www/shop.funstkunst.de/public_html/wp-includes/plugin.php(476): WP_Hook->do_action(Array) #3 /home/customer/www/shop.funstkunst.de/public_html/wp-includes/template-loader.php(13): do_action('template_redire...') #4 /home/customer/www/shop.funstkunst.de/public_html/wp-blog-header.php(19): require_once('/home/customer/...') #5 /home/customer/www/shop.funstkunst.de/public_html/index.php(17): require('/home/customer/...') #6 {main} thrown in /home/customer/www/shop.funstkunst.de/public_html/wp-content/plugins/woocommerce-germanized/includes/class-wc-gzd-checkout.php on line 188