Appointments Plugin API error

I have been receiving this error after following the instructions for installing the API, any suggestions to remedy would be GREATLY appreciated :slight_smile:

[Appointments+] The following error has been reported by Google Calendar API:
exception 'Google_ServiceException' with message 'Error calling POST https://www.googleapis.com/calendar/v3/calendars/m7q6ifnci0fpkofc2hgb7vb11o@group.calendar.google.com/events: (404) Not Found' in /home/content/53/8314453/html/cwcounseling.net/wp-content/plugins/appointments/includes/gcal/io/Google_REST.php:67
Recommendation: Please double check your settings.

url is: clearwatercounseling.net