Is this anything that cause by AV,
What is the exact SEP version? What components are in use?
Well as a test, fully disable SEP and see what the result is.
Is there anything related to Symantec filter driver, please let us know
SEP with AV AS only. 12.1.4 v
Disable SEP, see what the result is
Is there anything called Symantec filter driver related to antivirus.
Not by that name, no. Are you seeing additional errors or something else? At this point we're just taking guesses. What about running the symhelp tool?
check the firewall rule
https://support.symantec.com/en_US/article.TECH166273.html