This error occurs when the server can't find the requested resource. In the context of a JS script, this could mean that the URL to the script is incorrect or the script has been moved without updating the reference in the HTML.

A 404 error when adding a script to a website often indicates a broken link or incorrect URL path to the script file, which could stem from a typo in the script's source URL. It's important to double-check the script's URL for any misspellings or inaccuracies and ensure it points to the correct location of the script file on the server or hosting platform.

To resolve a 404 error when adding a script to your website, please carefully check the script's URL for any typos or inaccuracies and ensure it accurately reflects the script file's location. For accuracy, it's recommended to copy and paste the entire script directly from the dashboard.