WinRM cannot process the request. The following error occurred while using Kerberos authentication: The computer %1 is unknown ...

WinRM cannot process the request. The following error occurred while using Kerberos authentication: The computer %1 is unknown to Kerberos. Verify that the computer exists on the network, that the name provided is spelled correctly, and that the Kerberos configuration for accessing the computer is correct. The most common Kerberos configuration issue is that an SPN with the format HTTP/%1 is not configured for the target. If Kerberos is not required, specify the Negotiate authentication mechanism and resubmit the operation.