Softaculous installation gives following error :

Site error: the file /usr/local/cpanel/whostmgr/docroot/cgi/softaculous/enduser/main/functions.php requires the ionCube PHP Loader ioncube_loader_lin_5.2.so to be installed by the site administrator.
The Softaculous auto installer requires ioncube to be installed and active on the cPanel server to work.

Here are the steps to install ioncube on cPanel server.

1) ioncube php loader is extention to installed PHP. If ioncube is instlalled, then it can be checked using command

# php -v

2) If not installed, install it using following command.

# /scripts/phpextensionmgr install IonCubeLoader
3) Enable ioncube in WHM

WHM >> Tweak settings >> cPanel PHP loader [?] (Use oldsourceguardian for version 1.x and 2.x. )