Have you checked in the extensions for Endpoint Security Threat protection for Linux servers into ePO:
Page number 43: Install the extensions manually
Have you checked in the all 5 extensions file as referred in page 43.
Refer pg 58:
Managing policies McAfee Endpoint Security for Linux policies provide options to configure features, feature administration, and to log details on managed systems. You can find these policies on the Policy Catalog page under Product: • Endpoint Security Threat Prevention • Endpoint Security Common