If an error occurred on a 3rd-party script (a Javascript file not hosted on yoursite.com), by default Crazy Egg is not able to receive the error name, error message, or stack trace because of browser restrictions.
However, with some configuration on your end, we can capture all the details for all Javascript files.
Add the cross-origin attribute to your script tag, like this:
<script src="otherdomain.com/script.js" crossorigin>Then enable CORS on your server. For instructions, please visit https://enable-cors.org/server.html