# Administrator - FitTrackee 0.7.28 documentation

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# 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

  The variable `DATABASE_URL` 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).

## Map images are not displayed but map is shown in Workout detail

- Check the path in environment variables. `UPLOAD_FOLDER` must be set with an absolute path.

## Failed to upload or download files

- Check `client_max_body_size` in nginx config. Increase the value to handle larger files (see nginx documentation).

- Increase gunicorn timeout value if the following error is displayed in gunicorn log: `[CRITICAL] WORKER TIMEOUT`.