Vontu Manager service stops after the upgrade

After the succesfull upgrade proceedure from Symantec DLP 11.1 to 11.6 and rebooting the server i'm unable to connect to Enforce Console and noticed that "Vontu Manager" service doesn't starts automatically. After i start it manually and attempt to access Enforce Console the service crashes. 

I have 3-Tier installation and DB is up'n'runnin (connection with sqlplus was successful). Has anyone faced such an issue?

P.S. the issue isn't license-related-checked this variant by deleting any license and was still unable to get into the Enforce Console