I think there is something deeper going wrong with the system. I was able to book a few over the phone. After booking a few, we noticed one that went in wrong in MDE, even though she read it back right. When we looked back, we thought it was a fluke and rebooked it as the correct thing.
We booked a few more and then I got disconnected unfortunately, she couldn't hear me anymore! Either way, now when I look at my reservations every time I load they are showing in different things. For example sometimes my reservation on Day 1, is showing the same reservation on other days of my trip. Or a reservation will be for a completely different restaurant. If I reload something different may show. So I definitely think there may be a deeper issue then just ability to book.
MDE is saying they can't book reservations on app or phone now... Also saw in another chat it's happening in Disneyland app too.
finally got through on chat and they said they couldnt book anything. I mentioned that I had 'friends' who booked via chat so they tried..... and failed.