I have recently uploaded an assignment on canvas. But it now shows that I haven't uploaded anything

louis_dias17
Community Novice

On the 4th of march of this year, I uploaded an assignment on the platform. I am sure of this, as I double checked if I did it. I still have the proof that I uploaded it in my browser history. But by checking the canvas platform, it says that I have not uploaded anything. Please help me with this, as I now have missed the deadline because of a platform malfunction. Thank you.