I'm getting cranky - it's late, but:
If you're the student who's been told to submit an assignment through an online portal but "have a little trouble" and just email it to the lecturer just realise two things. 1/ Your assignment is currently in the ether and 2/ you couldn't do a thing that dozens of others managed to do. You're an exception, and not in a good way.
This is the most polite way I could reply:
"...this won't get into the marking system if it doesn't go in through myUni. It won't be lost, but it will remain a loose end until I compile the results after the exam. You still have just under a week to get it in through the system if you don't want it to languish - a dozen students have managed it that way so far."
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