First login into your Internet banking.
Now visit services option.
In Tatkal Time Fastest payment modes are banks which don't ask for OTP etc
The payment modes which are not available at Tatkal time are as follow :-
If you are using RuPay Card then you have to select RuPay Card (Powered by Kotak Bank) in Payment Gateway / Credit Card to pay from RuPay card of any bank.
Note: If you're unable to update your Extension, then remove and reinstall it.