Attached is the word document with the screenshots of the CPO target and Windows user configured to the target. Also the process execution which failed saying the CPO Target not reachable. It is the process to execute a simple windows command.
We also attached the screenshot of the Computer properties of the windows machine in which the CPO installed. These are the AWS EC2 instances we are using to create a lab on cloud.
CPO and windows based run time users are not supported in a local or "workgroup" environment. You should not be defining a domain as an IP address.
If you want to use an "all in one" then you need to install an AD controller on it and create a single computer based domain.
Even if you can get a workgroup to function (which I have seen from time to time) it will be touchy at best and if you have issues (like the above) TAC and engineering would not assist as it is not a supported configuration.
Is there a reason why you are not using a domain? (it's in the documentation as a requirement)
CIAC Adoption Pilot Engineering Lead