Thanks a million! It works! I can upload the form successfully by using the form from that linkJust tried now and followed the same steps when I got the error and it worked!! Here were my steps: Downloaded form from https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides.html. Then filled it using Acrobat Reader and uploaded it in IE 11. Works fine! Thanks a lot for your updates guys and Good Luck!!