If you are not receiving the invite to join Covr via email, follow these steps:
Check your spam/junk folders. Sometimes the email ends up there. You can also try searching your inbox for an email from notifications@covrhub.com
Verify with your supervisor that the email they have on file in your Covr profile is correct. If not, have them fix it and then resend you an invite. If it is correct, have them resend an invite anyway.
If the above steps did not work, you might want to consider using a different email address. Let your supervisor know and they can resend an invite to the new email address.