Policy not executing in client machines

I cloned the inventory policy and scheduled  to run on client machines. In resource manager policy is showing but not executing.

When i initiate the basic inventory task and full inventory it is completing successfully.

But policy are not executing getting in below errors

  <![CDATA[StartService('AeXNSClient'): Failed to open Service Control Manager, error 0x00000005 (Access is denied)]]>

  <![CDATA[getNewRulesFromWeb() error - HTTP status: 404. Invalid data received in HTTP response. Expected 1245 bytes, received 0]]>

Any suggestions will be great helpful