# Administrator

## FitTrackee fails to start

- Check the database URL in environment variables if the following error is displayed in gunicorn logs:

      sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:postgres

  It must start with postgresql:// (engine URLs starting with postgres:// are no longer supported).

- Check the email URL in environment variables if the following error is displayed in gunicorn logs:

      fittrackee.emails.exceptions.InvalidEmailUrlScheme

  A valid `EMAIL_URL` must be provided (see emails).