Submit button doesn't work when time runs out

Submit button does not work. Test should submit automatically when time runs out. After reloading page, student is no longer able to see test, instructor cannot see submissions.

Chrome only: DO NOT Submit button doesn't work, no way to close alert and submit

Firefox only: clicking DO NOT Submit moves dialogue box down the screen, still unable to submit or close alert

"1. As student, take an assessment
2. Work on test until due date, do not submit before due"

https://www.evernote.com/l/Assuut-9FoZCga48TF_eOmBUCZoNILoBaj0