I am trying to book a domestic flight in Argentina for later this year, but every time I try I get the error message " Lo sentimos! Los datos ingresados no fueron procesados correctamente." I have tried with multiple browsers, devices, cards and a VPN link to Argentina. I've checked with my bank and they aren't blocking the transaction

Any ideas why I'm getting this? I'd rather buy the flight directly from Aerolineas than from an online travel agent if possible.