docs: def error403(error):
      """
      Custom 403 page.
      """
      tb = error.traceback
  
      if isinstance(tb, dict) and "name" in tb and "uuid" in tb:
          return SimpleTemplate(PRIVATE_ACCESS_MSG).render(
              name=error.traceback["name"],
              uuid=error.traceback["uuid"]
          )
  
      return "Access denied!"