Hello {{service_provider_name}},
This is to let you know that an error has occurred when trying to sync your appointment to Google Calendar. To view the error, please go to the Settings -> Error Log page.

Google will invalidate your authentication token from time to time so this is the most likely cause. In order to resolve, please go to the Settings -> Connect page. If you do not see the "Authorize" button, click update on the Google profile once.
This will enable the Authorize button. Use it to authenticate again.

The {{site_name}} team