As the message says, there is missing field named “Missed Questions”. Make sure there is actually a field with this name. Pay attention to capitalization: Field names are case-sensitive, so “Missed Questions” is not the same as “missed questions”.
If you could post a link to the shared deck, that will be helpful.
I’m having the same problem. I know the problem is addressed on the official FAQ page but it isn’t working for me and I have no idea what to do. I shared the deck below. Thank you so much to anyone who helps.
PS It said I couldn’t include links so I had to break up the URL.