nintechnet on "[Plugin: NinjaFirewall (WP edition)] Installation Problem Godaddy Shared Hosting"

I don't think they will install HHVM.
My example was just to show that your case is very similar and that you can use our blog article to solve your issue.

Assuming that:
Your document_root is: /var/chroot/home/content/XX/XXXXXXX/html
Your WP is installed in: /home/content/XX/XXXXXXX/html/Wordpress/

1) Start NinjaFirewall installer from your WP admin dashboard.
2) When you reach the "System configuration" page, select "Other + HHVM" and click "Next Step".
3) Create a "/var/chroot/home/content/XX/XXXXXXX/html/route.php" script, and add the following code to it:

<?php
// Prepend the firewall for the /Wordpress/ sub-folder:
if ( strpos($_SERVER['SCRIPT_FILENAME'], '/home/content/XX/XXXXXXX/html/Wordpress') !== false ) {
   // Add the full path to NinjaFirewall firewall.php:
   require('/home/content/XX/XXXXXXX/html/Wordpress/wp-content/plugins/ninjafirewall/lib/firewall.php');
}

Edit the two "/XX/XXXXXXX/" occurrences with the correct paths.

4) Create a "/var/chroot/home/content/XX/XXXXXXX/html/php.ini", and add the following code to it:

; NinjaFirewall: load route.php
auto_prepend_file = /home/content/XX/XXXXXXX/html/route.php

Here again, replace the X's with the correct path.
Note: maybe you will need to use "/var/chroot/home/...." rather then "/home/..."

5) Go back to NinjaFirewall installer and click on the Test NinjaFirewall button.

If that does not work, you may need to rename the "php.ini" to ".user.ini" or "php5.ini". Also, as mentioned on Goddady's PHP INI page, you may need to wait a couple of minutes after making changes to the INI files.