Fatal error: Uncaught Error: Call to undefined method WC_Product_Variable::get_matching_variation() in /var/www/xn--styrpstress-18a.dk/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php:587 Stack trace: #0 /var/www/xn--styrpstress-18a.dk/public_html/wp-includes/class-wp-hook.php(286): WC_Form_Handler->add_to_cart_action('') #1 /var/www/xn--styrpstress-18a.dk/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /var/www/xn--styrpstress-18a.dk/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #3 /var/www/xn--styrpstress-18a.dk/public_html/wp-settings.php(505): do_action('init') #4 /var/www/xn--styrpstress-18a.dk/public_html/wp-config.php(86): require_once('/var/www/xn--st...') #5 /var/www/xn--styrpstress-18a.dk/public_html/wp-load.php(37): require_once('/var/www/xn--st...') #6 /var/www/xn--styrpstress-18a.dk/public_html/wp-blog-header.php(13): require_once('/var/www/xn--st...') #7 /var/www/xn--styrpstress-18a.dk/public_html/index.php(17): require( in /var/www/xn--styrpstress-18a.dk/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php on line 587