I'm having the same exact error message while trying to book Quality Apartments Melbourne. This is extremely frustrating and still happens when I tried to change to a different room type / different dates. Also getting all the way to the final reservation page when this error suddenly stops me from booking.

In addition, I tried to change my search to another hotel in Melbourne (Alto Hotel on Bourke, an Ascend Hotel), and this time I can't even proceed past the room selection page. The website greys out the "Book Room" button and gives me an error message that "You need 60,000 points to book X nights", even though I clearly have 63,000 points in my account.

I feel like Choice is purposely screwing us here....100% ready to burn these points and never stay with them again.