Tackle can lose permissions to access your Google Calendar after a while for a few possible reasons:
App updates: Updates to Google Calendar or the Tackle app can sometimes result in changes to permissions.
Token expiration: Authentication tokens that grant access to your Google Calendar data may expire. This could be due to security measures or periodic token refresh requirements.
Account changes: If you've updated your password or changed security settings in your Google account, it may require the app to be reauthorized for continued access.
App permissions revoked: Google may withdraw permissions for third-party apps.
Server Issues: It's very unlikely, but temporary server issues with Google or Tackle servers could occasionally disrupt access to Google Calendar.
How to re-authorize your calendar permission
Login to Tackle.
Once you're in, if your permission is gone, you'll see a popup asking you to confirm calendar permission. Click on "Grant Permission."
3. You'll be prompted to authorize your login to your Google account.
4. Once you've selected the Google account associated with Tackle, continue allowing permission for access to your calendar.
This should be it. Your Google account is now authorized with Tackle.