Sometimes Google calendar syncing may stop working and we need to disable and re-enable the service.
Go to your Google Accounts page: https://myaccount.google.com/security
Click Security
Scroll to "Your connections to third-party apps & services"
Click Practice Management by Jasmine
Click "Delete all connections you have with Practice Management by Jasmine"
Click "Confirm"
Remove old Google Calendar Sync token in Jasmine
Click the gear icon
Click Setup
Search for "Users"
Click Users menu item
Click Edit
Scroll down to Additional Information
Delete the GCal Sync Token
Click Save