I have a professor who is having an issue with a recent quiz. The students are not able to submit the quiz on a computer in Canvas. A few students have been able to submit the quiz by then logging into the Canvas student app and clicking the submit button. I looked over the quiz settings and didn't see anything that would prevent students from submitting it. It's still within the due and until dates. He had a few other quizzes earlier this semester that the students were able to submit. Any suggestions or ideas on what this issue could be? Thank you!