Administrator ############# `FitTrackee fails to start` ~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Check the database URL in `environment variables <../installation.html#envvar-DATABASE_URL>`__ if the following error is displayed in **gunicorn** logs: .. code:: 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 <../installation.html#envvar-EMAIL_URL>`__ if the following error is displayed in **gunicorn** logs: .. code:: fittrackee.emails.exceptions.InvalidEmailUrlScheme A valid ``EMAIL_URL`` must be provided (see `emails <../installation.html#emails>`__).