Looks like they are upgrading something on their system and the Breakfast Club part is down until the 6th of October
https://www.goodwood.com/goodwood-estate/system-upgrade/
What time are you aiming to get there? I'm hoping to arrive when they open up at 7 a.m. When I displayed before I parked in the paddocks but this time I am trying to get there earlier so I can park on the track, further down from the start/finish line.
If you just want to have a look at the cars then you can just turn up and park in the field nearby. It's free to get in and a great morning out. If your car is displayed you have to register and be accepted. You can then drive into Goodwood and show off your car.