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I have been using this plugin for a couple of years. A few days back I was notified that I needed to reauthenticate the Gmail service. I am using the Setup wizard to authenticate, but as soon as I click the “Connect to Google” button, the Google Login page shows an error – Error 400: redirect_uri_mismatch. You can’t sign in to this app because it doesn’t comply with Google’s OAuth 2.0 policy. If you’re the app developer, register the redirect URI in the Google Cloud Console.” View the screenshot
Please let me know if I did something wrong. Thank you.