When I enter my access code, I am being shown error message “Denied – Access code already used” – why?
It means that access code you entered has been previously used by you
(or someone else) to join a Class and cannot be used again.
Unfortunately, if it was used by someone else, we are not able to
help. You had been instructed to maintain confidentiality about
access code to prevent misuse of your access code by anyone else.