Android typically requires that you give individual apps permission to store their information.Go to Android Settings, then Accounts, then Google, then “account sync.” Make sure the calendar is turned on. Make sure your device is set up to sync with your Google account.
Be sure sync is enabled for the account you’re using (it can be turned on or off for each one.) In the app’s Settings, click the name of each personal calendar to see if sync is turned on. The Google Calendar app can include calendars for more than one Google account.
