Hello Lisa

Thank you for your purchase.

The issue here is probably with Google assigning too many access tokens to your existing employees.

If you know your way around the database, you can check that in wp_amelia_providers_to_google_calendar table. If you see there are multiple tokens assigned to a single user ID, delete all rows from that table, and try connecting your employee to his/hers Google Calendar again.

If it fails, I can take a look at your website and database, but I'll need you to provide me credentials for both.

We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course we do not provide login data to third party. 

You can write credentials here just check Private Reply so nobody can see them except us.

You're welcome Lisa

If you have any further questions or issues, please feel free to open a new ticket, and we'll gladly help.