Submit button not working while using the Respondus lockdown browser for Canvas Quizzes

[swold]

Hello-

Nobody every responds on here, so I am unsure why I am even asking. I am trying to use Canvas New Quizzes with the Respondus Lockdown Browser. My course will be shifting to a digital exam format for AP World History. 

I created a Multiple-choice quiz and had the students take the quiz. Two of my students were unable to click on submit. The button basically went dead/inactive when they tried to submit. Has anybody else experienced this issue? If so, how did you fix it?

Thanks.