My son is a freshman in high school and is having intermittent problems with assignments not submitting correctly in canvas. Sometimes it works, sometimes it doesn't. He usually uploads PDF's of assignments, occasionally a video. Sometimes he gets an error message when he tries to submit and sometimes it looks like the assignment was submitted but then he gets a very long error message that it did not submit. I can't find any answers in the guides for this. He's been to the "expert" in the high school to solve this but it is not solved yet. Any one have any suggestions on how we can try to get this fixed so he's not falling behind on assignments?