Khatam Pen x2

Khatam Pen x2 quantity Fatal error: Uncaught Error: Call to undefined function wp_readonly() in /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/templates/global/quantity-input.php:43 Stack trace: #0 /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(345): include() #1 /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php(1815): wc_get_template('global/quantity...', Array) #2 /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/templates/single-product/add-to-cart/simple.php(42): woocommerce_quantity_input(Array) #3 /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(345): include('/var/www/vhosts...') #4 /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php(1697): wc_get_template('single-product/...') #5 /var in /var/www/vhosts/khatamart.com/khatamart.com/public_html/wp-content/plugins/woocommerce/templates/global/quantity-input.php on line 43