Can not start Auto-Protect on Symantec Endpoint Protection Client for Linux

Products

• Endpoint Protection

Issue/Introduction

When Symantec Endpoint Protection Client for Linux(A.K.A. SEPFL) is installed on my Linux system, it failed to load Auto-Protect module.
following error occurred in service status:

# systemctl status autoprotect

● autoprotect.service - LSB: Symantec AutoProtect Modules
   Loaded: loaded (/etc/rc.d/init.d/autoprotect; generated)
   Active: failed (Result: exit-code) since DateTime information
     Docs: man:systemd-sysv-generator(8)
  Process: PID ExecStart=/etc/rc.d/init.d/autoprotect start (code=exited, status=1/FAILURE)

  Datetime Host systemd[1]: Starting LSB: Symantec AutoProtect Modules...
  Datetime Host autoprotect[28726]: CONFIG_RETPOLINE=y
  Datetime Host autoprotect[28726]: Starting AP: insmod: ERROR: could not insert module /opt/Symantec/autoprotect/symev-custom-4.18.0-80.el8-x86_64>
  Datetime Host autoprotect[28726]: <11>Jun 22 18:11:44 symev: unable to load kernel support module (UNSUPPORTED-OS-ct-UNK-UNK-4.18.0-80.el8-)
  Datetime Host systemd[1]: autoprotect.service: Control process exited, code=exited status=1
  Datetime Host systemd[1]: autoprotect.service: Failed with result 'exit-code'.
  Datetime Host systemd[1]: Failed to start LSB: Symantec AutoProtect Modules.

Environment

Symantec Endpoint Protection client For Linux 14.3 MP1 or previous 

Cause

Symantec Endpoint Protection client For Linux 14.3 MP1 or previous is not compatible with SecureBoot.

Resolution

Please disable SecureBoot on OS side

Additional Information

Symantec Endpoint Protection 14.3 RU3 and above are able to work with Secure Boot. For these versions follow the steps in: Configure a secure boot system with Symantec DCS or SEP Linux products.