If you open a browser error console, you can see it contains javascript error. The error is not related to "ARI Data Tables", but it prevents execution of "ARI Data Tables" javascript code. It seems the error occurs due to extension which is used on your site to remove MooTools library or optimize loading of javascript files. We can investigate the problem in more details if you provide a temporary access to your J! backend by
email.
PS: The extension is under GNU GPL license and doesn't require license keys for domains.
Regards,
ARI Soft