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What are some reasons the extension fails to scan?

This guide provides an explanation for the common "Unable to scan page" error and offers troubleshooting steps.

The most common cause for the error "Unable to scan page. Please re-open this window" is that the extension's content script was not properly loaded onto the webpage.
 
Reasons for the content script failing to load include:
  • Page Loading Issues: The page is loading slowly or has other JavaScript errors that are causing problems with the loading process.
  • Recent Extension Update: If the extension was recently updated, Chrome may not re-inject content scripts into already open tabs, which requires a page refresh.
  • Unsupported Content: The extension is designed to work only on webpages (HTML content). It will not work on file types like PDFs when viewed in the browser, or on system pages like Chrome settings pages.
If you encounter this error, try the following steps:
  1. Refresh the page and attempt to run the scan again.
  2. Check to ensure you have the latest version of the extension installed.
  3. Check the page for any other errors that might be preventing the page from loading completely or correctly.