When troubleshooting WinRM errors, you’ll sometime encounter hex error codes, such as 0×80338104, which don’t say much about the error itself. In such cases, you can use the winrm command line tool with the helpmsg parameter, to convert the error code to a readable error description.
PS> winrm helpmsg 0x80338104 The WS-Management service cannot process the request. The WMI service returned an 'access denied' error.
Bonus tip: All error codes that start with 0×8033 are WinRM errors.