Hi,
It seemed like you have not installed an extension of Mcafee EPO, Whether either you were using EPO 4.0.
Maybe you need to update it to Patch 4.
For more information, please kindly refer to the following link:
https://mcafee-ext.hosted.jivesoftware.com/thread/28090
If the issue still persists, you need to contact Mcafee support.