I am getting this error in my server log
[host stofmoellen.dk] Backend log: id was called incorrectly. Varens karakteristika bxc3xb8r ikke kunne tilgxc3xa5s direkte. Backtrace: require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), do_action('template_redirect'), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::do_wc_ajax, do_action('wc_ajax_get_variation'), WP_Hook->do_action, WP_Hook->apply_filters, WC_AJAX::get_variation, WC_Product_Variable->get_available_variation, WC_Product->get_price_html, apply_filters('woocommerce_get_price_html'), WP_Hook->apply_filters, Alg_WC_PQ_Core->pq_change_product_price_unit, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong. This message was added in version 3.0.n