Same here. I wanted to book an open jaws but the SV website quoted for some reason in Indian rupees. That is easily 20 Euro in cc/exchange charges, and an OTA offered it with a 20 Euro discount or so, so I went for the OTA. I don't manage to get a stopover visa (payment does not work), and the hotel cannot be booked giving the same error message as described above. Well, that implies a night in the airport hotel I guess.....