Add failed, the calendar-related access permissions are not allowed.

On the second screen (account settings), the setting to allow Zoom to Manage Email and Calendar events would need to be turned off, otherwise Google interprets the request for the full access scope.  Even with this off, your Zoom meetings should be pushed to Google, and with the Google add-in, you can book Zoom meetings.  You just will not be able to synchronize your calendar with the Zoom calendar.

Unfortunately, turning off this setting had no effect on enabling calendar through the ZOOM client. I am presented with the same access choices (and select none other than add/edit) and the same error,

When you refer to Groups, are you referring to being part of a larger ZOOM corporate group where we have single master account? That is not the case. My ZOOM account is not attached to or associated with a master account. I subscribed individually. I am the account owner.

We are all chasing our tails, when the issue may be simple that Zoom engineers haven’t written good code for making the connection and left to a work around to this mouse trap.  if its junk then lest call it the connect tor is junk!

Okay, as someone earlier remarked and I can confirm the following:

 On a free zoom account the following behavior when connecting Google Calendar:

 If you choose anything other than “select all” permissions the connection fails and that is because the connector is poorly written and wants promiscuous  access.

You can make the connection with “select all” and then come back into the admin to narrow down some “write” access but it still leaves the pernicious access rights over your calendars, as in it can delete all your calendars not just the meeting.

In a nutshell it demands far too promiscuous access control and so not secure!