Hello Jonathan

Thank you for your purchase.

Can you please tell me which version of libxml do you use?

You should find the libxml version in your php.info file.

If the version is less than 2.7.8, you will need to modify the file ../wp-content/plugins/wpdatatables/source/class.wdttools.php. Around line 915 you'll see this code: 

if (self::isHtml($string)) {
$string = self::stripJsAttributes($string);
}

Just comment it, so the code looks like this:

//if (self::isHtml($string)) {
//$string = self::stripJsAttributes($string);
//}

And after that it should work for your version of libxml.

Please let me know.