Some plugins including CSV Import and Neatline may need to execute code using the command-line version of PHP. If your plugin requires this it can be enabled by editing the file at application/config/config.ini and modifying the background.php.path = "" line to the following:
background.php.path = "/usr/bin/php-cli"
Note: Newer servers on Rockaway Hosting have a new php-cli path of /usr/local/bin/php. If the old path doesn't work try the new one.
Editing files are easy within cPanel by using the File Manager under the Files section. Simply navigate to the folder location and click the file and you'll have the option for a code editor: