The above error appears, because of an incorrect path that was set on the ISAPI filters of OfficeScan or SMEX website in IIS.
To resolve this:
- Open IIS Manager.
- Select which site you want to configure
- For WFBS Console: Expand Sites > OfficeScan.
- For MSA Console: Expand Sites > SMEX Web Site.
From the above screenshot, change the "\\" to "\". The path will be: