Appointments+ New Version Google OAuth 2.0 Error

Greetings! I hope you're doing well today! I'm upgrading to version 1.7 and completed the Google App setup for Client ID and Secret Code. Now, there's a link to: Google Calendar API: Authorize access to your Google Application, but when I click on the link, I get an Error 400, from Google:

Error: redirect_uri_mismatch

I'm lost as to how to complete this process to generate my access code. I've already set the WPMUDEV Dashboard to allow support access.