Haha thank you!! I carried it over from reddit. Hope this fixes your issue!
This is an unfortunate bug I ran into as well. I had to fix it by making my password shorter. Went from an iCloud managed/generated password to my own password that was around a dozen characters and then I was able to login.
I’m going to tell myself this is why I’m not getting upvotes and it’s not because I’m entirely uninteresting lol