While booking a flight ticket, payment went out successfully but then got Error msg. Soon I got a phone call from Yatra to confirm if I wanted to book flight. I did. Major problem is that while booking a flight, by default, they check many box like giving you Free Berclay Carc, Tata Insurance, Reliance product, etc.
So you have to un-check all boxes every time you book a flight.
I always get extra Rs.200 off by getting a free promotion code from website https://PromoCodesFree.com It is simple and saves Rs.200.
I have also booked on sites like travelocity.co.in and had similar error. But till date, my claim is pending. Neither they booked, nor they gave any refund. Periodically, I keep on reminding them.
Of course, Yatra can improve.