To capture outbound links automatically without having to add custom code on the website, you can use the s.trackExternalLinks variable, which automatically captures external links without having to add specific click tracking code. However, you need to ensure that the s.trackExternalLinks variable is set to true before the s.t() call.
According to Adobe Analytics Developer documentation on trackExternalLinks, the recommended approach is to set the s.trackExternalLinks variable to true before the s.t() call on each page, as shown in the following code:
s.trackExternalLinks = true;
s.t();
This approach ensures that the s.trackExternalLinks variable is set before the call to s.t(), which sends the data to Adobe Analytics.
Reference:
Adobe Analytics Developer Documentation: https://docs.adobe.com/content/help/en/analytics/implementation/vars/page-vars/config-vars.html#section_59B0D9A9A11C4D0FAF2F6622C3D78420

This exception indicates that a JavaScript object was expected but was not provided. This can happen when a variable is referenced without being defined, or when a parameter is expected but not provided. For more detailed information, please refer to the Mozilla Developer Network documentation (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Not_non-null_object).

The first step to add a new extension is to select an extension from the extensions catalog. To do this, from a property's overview page, open the Extensions tab and select an extension from the list. You can then mouse over an extension to configure it.

This code will throw a "RangeError: radix must be an integer" exception in JavaScript, as the radix value passed to the toString() method must be an integer between 2 and 36. Reference: https://www.adobe.com/content/dam/acom/en/devnet/analytics/analytics-developer-professional-study-guide.pdf

According to Adobe Analytics Developer Professional documents, to reference a data layer variable in Adobe Launch, the type of data element should be "Javascript Variable". This allows you to reference the data layer variable in your Launch rules and send the data to Adobe Analytics for reporting. The "Data Layer" type is used to create data elements that are used to read data from the data layer, and "DOM Attribute" type is used to read data from HTML DOM elements.