Opencart\System\Library\Cart\Currency::format(): Argument #1 ($number) must be of type float, string given, called in /var/www/vhosts/projectmyst.com/httpdocs/catalog/controller/checkout/voucher.php on line 38: in /var/www/vhosts/projectmyst.com/httpdocs/system/library/cart/currency.php on line 48