Just a wild guess but it looks like there was a problem loading submissions and students.
But seriously, I can't even tell what I'm looking at here. If you can provide a little more context about the issue and screenshot someone might have some ideas.
I apologize for not replying quickly. And errors do not occur on this system I'm very sorry to ask about this. And finally, I apologize to your support team for calling. But i can't answer your question
Retrieving data ...