many of our clients have experienced the same issue this year! 

in SOME of the cases, this is the feedback that helps: 

For some clients, after they accept the link and login,
they also have to go to top right, where their business name is and click the dropdown that has multiple users. EVEN THOUGH it's the same user.

It'll list their one user name two times, and they have to click on the alternate name to see the organizer.