_General
Beyond just pinging the domains used by Cyber Crucible to make sure that your endpoint can reach all of the correct network address, the Cyber Crucible Agent installer includes a test argument that ensures a valid TLS/SSL connection can be made in both directions to all required servers.
Simply add --test-connection to the installer execution, making sure to still include group id(s) and OAuth tokens that are necessary to perform authentication. Seen above is a screenshot showing the only modification needed to the provided .bat script, and a successful output.