How to Allow Error Messages for Scraper

I was trying to allow error messages but I got stuck on step three below (bolded). Could someone help me understand what the background page is?

To access error messages follow these steps:

  1. Open chrome://extensions/ or go to manage extensions
  2. Enable “developer mode” at the top right
    3. Open Web Scrapers “background page”
  3. A new popup window should appear.
  4. Go to “Console” tab. You should see Web Scraper log messages and errors there.

Background page is here:

And the popup with console looks like this: