# JavascriptException error

{% hint style="warning" %}
**JavascriptException error** <mark style="color:red;">occurs when there is an error in the action script</mark>. Action scripts written in JavaScript may not properly handle changes in web page structure or may be incorrectly written from the start, which can cause this kind of error.
{% endhint %}

{% hint style="success" %}
If you purchased the action script from Listly, please contact us at [hello@listly.io](https://app.gitbook.com/u/iRt8wxtP72UkO2X1WydZjD4Byw23) with your Listly account you used to sign up and the URL you want to extract.
{% endhint %}