rhncfg-manager command throws "xmlrpclib.ProtocolError: <ProtocolError for localhost:443: 403 Forbidden>"

Issue

• rhncfg-manager throws following error when trying to run it from Satellite server itself:

  ########
  xmlrpclib.ProtocolError: <ProtocolError for localhost:443: 403 Forbidden> 
  ########
  
  Exception Handler Information
  Traceback (most recent call last):
    File "/usr/share/rhn/server/apacheServer.py", line 58, in __call__
      ret = f(req)
    File "/usr/share/rhn/server/apacheHandler.py", line 198, in handler
      ret = self._req_processor.process()
    File "/usr/share/rhn/server/apacheRequest.py", line 465, in process
      params, method = self.decode(_body)
    File "/usr/share/rhn/server/apacheRequest.py", line 389, in decode
      self.parser.feed(data)
    File "/usr/lib64/python2.4/xmlrpclib.py", line 527, in feed
      self._parser.Parse(data, 0)
  ExpatError: not well-formed (invalid token): line 1, column 1
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