problem running

[jjmilad]

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=3000): Max retries exceeded with url: /parser?url=https://medium.com/@NirZicherman/tales-of-the-startup-uncertainty-principle-2d9bc3bd409c (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x10d40af80>: Failed to establish a new connection: [Errno 61] Connection refused'))