I am having errors with checkout on wordpress
Notice: tax_class was called incorrectly. Product properties should not be accessed directly. Backtrace: require(‘wp-blog-header.php’), require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘wp_loaded’), WP_Hook->do_action, WP_Hook->apply_filters, WC_Cart_Session->get_cart_from_session, WC_Cart->calculate_totals, WC_Cart_Totals->__construct, WC_Cart_Totals->calculate, WC_Cart_Totals->calculate_fee_totals, WC_Cart_Totals->get_fees_from_cart, WC_Cart->calculate_fees, do_action(‘woocommerce_cart_calculate_fees’), WP_Hook->do_action, WP_Hook->apply_filters, TM_Extra_Product_Options->tm_calculate_cart_fee, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong.
This is the error i am experiencing, please how do i solve this?