Hi, Thanks for your reply.
Please find the details,
Apache/2.4.6 (Red Hat Enterprise Linux) PHP/5.4.16
Yes, all the ports are enabled and still not able to save the details.
I could see the below PHP error in the apache log, seems the PHP version is lower.
Class 'DateTimeImmutable' not found in /var/www/html/support/include/class.misc.php on line 155, referer: http://XXXX/support/scp/emails.php?id=1
Kindly help on this.