Error Adding Dining Party to Existing Reservation

[BillFromCT]

I made an ADR today for HDDR for 7 people. I had to make it via phone to get the TIW discount. The reservation was attached to my MDE account when I went in after the call, so no issue there. I tried to Update Guests on the website to add everyone's name in, but I keep getting:

Error:There was an issue assigning one or more Guests to this reservation

The app version of MDE won't let me go into that ADR at all, but other ADRs it will. I know I don't need their names on the ADR, but I like to have everyone accounted for for each day. Anyone have any thoughts?

 

[MainMom]

If any of them have their own separate MDE account they may have to go in and update their information. I had to do that for my DH and DD.

MDE has also been very glitchy yesterday and this morning for me.