"Field Name is Required" error on quiz submit with latest version

Hello John and thank you for posting.
We are planning to update this website at some point in the future and having a few archive versions of our extensions is one of the things I would like to have, indeed.

The problem originates from the fact that I included an additional option for quizzes to select whether you want extra fields in each quiz or not.
Version 1.10.1176 included this option and having extra fields became the default behavior of quizzes. The default extra field is just a sample field called "Field Name", and it is required.
Hence the error "Field Name is Required". If the user details fieldset were visible, you would have seen an extra field called Field Name there.
So, it was a combination of factors. I apologize for this inconvenience. It won't happen again.

I have changed that now and released version 1.10.1179 which is an urgent bug fix release.
I wasn't able to install it to your site, but I did check and I still have the administrator account, so I went in all quizzes and set "Include Extra Fields" to "No", so it all works again.
If you want, you can install this latest version whenever you can.

Thank you for your understanding.