on the amex travel website it says
Important notice: Travel Credits and Membership Rewards will be temporarily unavailable on 4 September 2018 from 19:00 to 5 September 2018 15:00 (AEST) to redeem for travel bookings online or by phone due to scheduled maintenance. We apologise for any inconvenience this may cause.
and
Please note: Due to technical difficulties, it is temporarily not possible to log in to the American Express Travel site. If you wish to pay with a Travel Credit and/or Membership Rewards Points, please try again later. You can continue to book and pay with your Card only.
Gold, Platinum & Centurion Supplementary Card Members - FINE HOTELS & RESORTS and The Hotel Collection are only available to be booked online by the Basic Card Member.
If you are a supplementary Platinum Card Member or Centurion Member please call the Platinum or Centurion Travel Service number on the back of your Card to book your FINE HOTELS & RESORTS or The Hotel Collection stay.
I think its just a glitch that i have extra travel credit.Probably will disappear tomorrow.