domain-list: about certgrinder HOT 3 OPEN

Update: After further testing, it appears the issue is not the " - " in the domain-list directive.

Commenting out the domain-list: directive in certgrinder.conf, and instead issuing certgrinder -c ~/certgrinder.conf --domain-list example.com get certificate produces the same ssh error:

2022-05-17 19:43:20 -0600 certgrinder INFO Getting new certificate for domainset ['example.com'] ...
2022-05-17 19:43:20 -0600 certgrinder WARNING ssh: illegal option -- -
......
2022-05-17 19:43:20 -0600 certgrinder ERROR Did not get any output, expected a certificate chain in stdout from certgrinderd

The certgrinder client can login to certgrinderd server, and the error stops the ssh process before attempting to connect to the server. Any idea what the ssh error might be referring to?

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Just FYI: Installed from pip, and the only directives configured in certgrinder.conf are path: and certgrinderd:, everything else commented out.

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And lastly, the output of debug:

2022-05-17 22:13:24 -0600 certgrinder DEBUG Certgrinder.run_certgrinderd():709: Running certgrinderd command: ['ssh', '[email protected]', '-T', '--log-level', 'DEBUG', '--acme-server-url', 'https://acme-staging-v02.api.letsencrypt.org/directory', '--preferred-chain', 'Fake_LE_Root_X1', 'get', 'certificate']
2022-05-17 22:13:24 -0600 certgrinder WARNING Certgrinder.run_certgrinderd():745: ssh: illegal option -- -
.....
2022-05-17 22:13:24 -0600 certgrinder ERROR Certgrinder.get_certificate():888: Did not get any output, expected a certificate chain in stdout from certgrinderd

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