Can not place order in one step checkout

[amitnavsoft]

We have one step checkout ( ahead-works ) in our store. When we try to place order using Razorpay, it gives error.

Razorpay Error: Notice: Undefined index: rzp_payment_id in /var/www/vhosts/www.myborosil.com/webroot/app/code/Razorpay/Magento/Model/PaymentMethod.php on line 228.

Step to reproduce

1. Install fresh Magento 2.3.4
2. Install one step checkout ( ahead-works ) and enable it
3. Install Razorpay and set all configuration for able to checkout
4. Add product to cart in the frontend
5. Go to checkout and place order.

Expected Result:
Able to razor pay payment popup

Actual Result:

Getting below error :-
Razorpay Error: Notice: Undefined index: rzp_payment_id in /var/www/vhosts/www.myborosil.com/webroot/app/code/Razorpay/Magento/Model/PaymentMethod.php on line 228.

Note : we are able place order with other payment methods.