Fatal error: Uncaught Error: Call to undefined function is_cart() in /var/www/studiegrej.dk/public_html/wp-content/plugins/woocommerce-multiple-free-gift/lib/WFG_Frontend.class.php:279
Stack trace:
#0 /var/www/studiegrej.dk/public_html/wp-includes/class-wp-hook.php(286): WFG_Frontend->validate_gifts('')
#1 /var/www/studiegrej.dk/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /var/www/studiegrej.dk/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /var/www/studiegrej.dk/public_html/wp-includes/general-template.php(2745): do_action('wp_head')
#4 /var/www/studiegrej.dk/public_html/wp-content/themes/theshop/header.php(17): wp_head()
#5 /var/www/studiegrej.dk/public_html/wp-includes/template.php(722): require_once('/var/www/studie...')
#6 /var/www/studiegrej.dk/public_html/wp-includes/template.php(671): load_template('/var/www/studie...', true)
#7 /var/www/studiegrej.dk/public_html/wp-includes/general-template.php(41): locate_template(Array, true)
#8 /var/www/studiegr in /var/www/studiegrej.dk/public_html/wp-content/plugins/woocommerce-multiple-free-gift/lib/WFG_Frontend.class.php on line 279
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