Cannot download threat info through neither docker's "bootstrap" nor "build_bron.py" manually.

[jayzheng98]

bootstrap logs:

raise ConnectionError(e, request=request) requests.exceptions.ConnectionError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /mitre/cti/master/enterprise-attack/enterprise-attack.json (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f861a1fe6d0>: Failed to establish a new connection: [Errno 111] Connection refused'))