error Class 'JRequest' not found in

-- HikaShop version -- : 4.4.3
-- Joomla version -- : 4.0.3
-- PHP version -- : 7.4
-- Error-message(debug-mod must be tuned on) -- : JRequest Error

hi
We wrote a payment gateway. It was not a problem on Joomla 3.9 and it has been working since we updated Joomla to version 4. Unfortunately this plugin has encountered an error Class 'JRequest' not found in. How can I change this JRequest class?

thank you

thank you i wrote

function onPaymentConfiguration(&$element)
{
$subtask = hikaInput::get()->getCmd('subtask', '');
parent::onPaymentConfiguration($element);
//$this->address = hikashop_get('type.address');
}
Unfortunately, I got an error

hi
thanks for your help. JRequest error problem solved.
But after returning from the payment gateway(callback), I encounter the following error:
0
Invalid address: (to):

site.com/index.php?option=com_hikashop&c...0006285412&Status=OK

In the return link, you can see that the purchase is correct, but due to this error, the status of the orders will not be confirmed. I think the reason for this is this error.
thank you.