Been renting Avis for years. Last night when I tried to book a reservation with company AWD and coupon code, the webpage won't let me, saying "The rate code you entered is not applicable for the selected return date". But I tried different dates, different coupon codes, all spitted out the same error message. Anyone had this issue recently?

Booking the same reservation over Avis iPhone App did not give this error, so the issue resides on their webpage side.