Anyone else having trouble booking a flight? After I select my outbound and return flights, I click on "Continue as guest" and it gives me an error: "The page encountered an error processing your request."

I can reproduce this error even if I search for a totally random flight with different origin and destination and dates, so it seems to be pretty widespread.

Strangely, I only get this error when I try booking with the USA website, and it works fine with the Canadian website.