Mod_Security Disable Command then restart httpd:
whmapi1 disable_modsec_features user=username
systemctl restart httpd
or, set the below disable modsecury in .htaccess file
<IfModule mod_security2.c>
SecRuleEngine Off
</IfModule>
uapi --user=turangam ModSecurity disable_domains domains=turangamartbd.com