Hello, I am the TA in one course. I got a problem about the online Multiple choices. I publish an online MCs in canvas as assignments. When I log into the assignment part to see the details of students who submitted the answers, the system told me that' Quiz hasn't been taken yet or is currently in progress' for this student. But the reality is the student did submit his assignments and I can see his detail result before. So how can I solve this problem right now?