Thread:Extension talk:Scribunto/Blank page when submitting/reply (2)

Ok, so now any pages with Lua stuff (using Scribunto) show up with this error message:

Warning: escapeshellarg has been disabled for security reasons in /*directorytowiki*/includes/GlobalFunctions.php on line 2714

I do run this on my own server, so I can modify settings, etc. It's Sentora, so I'm guessing that it's been disabled somewhere. Odd thing is, when Googling it it seems to be related to upload settings, which doesn't make sense. By the way, I just enabled PHP debugging in LocalSettings:

error_reporting( -1 ); ini_set( 'display_errors', 1 );

Is that warning unrelated to the issue?

Edit: So that error does go away when uninstalling (removing from LocalSettings). So it is related to the plugin. How can I enable "escapeshellarg"?