Verify that the specified computer name %ComputerName; is valid, that the computer is accessible over the network, and that ...

Verify that the specified computer name %ComputerName; is valid, that the computer is accessible over the network, and that a firewall exception for the WinRM service is enabled and allows access from this computer. By default, the WinRM firewall exception for public profiles limits access to remote computers within the same local subnet.

Also verify that the WinRM service on the destination is running and is accepting requests. Consult the logs and documentation for the WS-Management service running on the destination, most commonly IIS or WinRM. If the destination is the WinRM service, run the following command on the destination to analyze and configure the WinRM service: winrm quickconfig.