I was on the phone with Premier support today, and although the two people I talked with spent a lot of time on it, we really didn't get beyond just a suggestion to paper file. I visually compared 1116s from 2020 to 2019 and found no differences except the number.
The interview was asking me to deal with 1116 AMT and I'm not sure why. I did have a foreign tax AMT carryover from 2018 to 2019, but not into 2020. This is a complex area I know nothing about and is probably unrelated but I mention it in case there is something in common.
I feel fairly certain that this is a program bug since TurboTax is completely happy with the forms/return but it won't pass IRS muster. Form 1116 hasn't been approved for filing for long, so I'm thinking others will be encountering this soon.
