Проблема при оформлении заказа

Здравствуйте.
При Оформлении заказа появилась ошибка
Warning: Invalid argument supplied for foreach() in /home/www/wp-content/plugins/woocommerce/includes/class-wc-checkout.php on line 267
Вот что в данной строке:

foreach ( $this->fields as $field_type => $fields ) {
			// Sort each of the checkout field sections based on priority.
			uasort( $this->fields[ $field_type ], 'wc_checkout_fields_uasort_comparison' );

			// Add accessibility labels to fields that have placeholders.
			foreach ( $fields as $single_field_type => $field ) {
				if ( empty( $field['label'] ) && ! empty( $field['placeholder'] ) ) {
					$this->fields[ $field_type ][ $single_field_type ]['label']       = $field['placeholder'];
					$this->fields[ $field_type ][ $single_field_type ]['label_class'] = array( 'screen-reader-text' );
				}
			}
		}

подскажите как исправить