Hey guys. Good news. I was able to get our documents uploaded. I filed under technical details. I sent multiple requests and one was accepted.
This is what I wrote: We are unable to upload documents requested for our Express Entry application, due to the upload button not working on the Documents to Submit website. We raised a ticket on Nov21, but haven't yet received any reply. We already missed one of the deadlines, in spite of paying the fee. We are ready to move to Canada but our COPR expired due to Covid delays. Please help solve this issue. Many users are facing the same issue, as per forums. Thanks!
I also sent DMs to many Canada immigration related handles.