I have updated it any how on Test Env.
It gives Error like
"PHP script '/usr/local/nagiosxi/html/includes/dbl.inc.php' is protected by SourceGuardian and requires a SourceGuardian loader 'ixed.7.1.lin' to be installed"
i have added "ixed.7.1.lin" under /usr/lib64/php/modules/ and modified /etc/php.d/sourceguardian.ini accordingly.
Now, I getting Blank screen at Deafult URL : http://10.253.237.35/nagiosxi/
Thanks in advance