Error discovering DNS for example.com

$satori example.com
Traceback (most recent call last):
  File "/code/satori/.venv/bin/satori", line 10, in <module>
    sys.exit(main())
  File "/code/satori/satori/shell.py", line 127, in main
    results = discovery.run(args.netloc, args)
  File "/code/satori/satori/discovery.py", line 37, in run
    results['domain'] = dns.domain_info(address)
  File "/code/satori/satori/dns.py", line 56, in domain_info
    result = pythonwhois.get_whois(domain)
  File "/code/satori/.venv/src/pythonwhois/pythonwhois/__init__.py", line 4, in get_whois
    raw_data = net.get_whois_raw(domain)
  File "/code/satori/.venv/src/pythonwhois/pythonwhois/net.py", line 7, in get_whois_raw
    target_server = get_root_server(domain)
  File "/code/satori/.venv/src/pythonwhois/pythonwhois/net.py", line 41, in get_root_server
    raise shared.WhoisException("No root WHOIS server found for TLD.")
pythonwhois.shared.WhoisException: No root WHOIS server found for TLD.