I did clear cache from the below command
php app/console cache:clear
After that I cannot be able to login back to mautic.
I see the login page normally but when I enter username and password it is not working.
I see last error in my log as below,
mautic.CRITICAL: Uncaught PHP Exception JSMin_UnterminatedStringException: "JSMin: Unterminated String at byte 138349: '); // Insert your pixel ID here."