Error 0x803380D7

Value: -2144108329 | 0x803380D7 | 2150858967

What does it mean ?

ERROR_WSMAN_CLIENT_UNENCRYPTED_HTTP_ONLY  
The WinRM client cannot process the request. The unencrypted flag only applies to the HTTP transport. Remove the unencrypted flag or change the transport and try again the request.
Value: 32983 | 0x80D7 | 0b1000000011010111

Where does it come from ?

FACILITY_WINRM  
Windows Resource Manager
Value: 51 | 0x033 | 0b00110011

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