I found this on Facebook just now and it worked (I got Cafe Orleans):
Reservations are available NOW in the app. Do not wait in the queue. Click on my plans, then the plus, then Reserve Dining, and ignore all errors. Choose close. Do NOT go to the website. Keep ignoring all errors and click close every time. You also have to select specific times. I was able to make reservations using the app. This is the same nonsense that happened last time, but I learned my lesson.