Error: Could not fetch URL - HTTPSConnectionPool(host='web.archive.org', port=443): Max retries exceeded with url: /web/20160617193535/https://ecse.rpi.edu/courses/S15/ECSE-4780/Labs/IDE/IDE_SPEC.PDF (Caused by NewConnectionError("HTTPSConnection(host='web.archive.org', port=443): Failed to establish a new connection: [Errno 111] Connection refused"))