Get the invite code byHad oath (Nov29). I did not get any email to create an online portal to download e-certificate. Do they send a separate email for that? I sent them the affirmation form within an hour.
https://ircc.canada.ca/visit-visiter/en/get-account-ircc-portal
Create an account by
https://portal-portail.apps.cic.gc.ca/signup?lang=en