I am having the same issue, I am owner and listing admin, put my co-host as primary contact because she deals with guests directly. It always worked fine, we could both see everything and payments were sent to my account . Since a couple of days I can't access reservation info or message the guests, plus the payment was sent to her.
Really unexpected headache, never thought making her primary point of contact would leave me out of all communication and payments.
I have made myself main point of contact for now but still can't access current reservation.
I can see in Calendar, but that's it. As far @Christina594 's question, also not successful getting it resolved, called them a couple of times and messages , nothing yet. They must have made a system change that is not easy to reverse, it's been a few days and many people must be contacting them... Let's see how this evolves