There are a few possible reasons why the Opportunity Score might be missing from your extension.
The first thing to verify is that you are on an Amazon Product Results page before running the extension. The Opportunity Score won't be displayed on an individual product page or Amazon home page (www.amazon.com) as there will be no metrics for demand, competition, or listing quality other than the single product.
Please open this link and run the extension. You should see the Opportunity Score on that page.
If you are still having issues after running through these steps, we recommend going over the instructions in the following article: Extension → Installing, Uninstalling, or Reinstalling Extension