Hello! I see you're having trouble with the digital scan barcode section and menu pop-ups in the Rubio’s app—they flash quickly and then disappear, correct? Just to clarify, are you using the app on your Windows 10 device through a browser, like WebKit, or is this the installed app software? Also, does this happen every time you try to open those features or only intermittently?

While I wait for your details, let's start with a few basic steps to see if we can get those barcode scans and menu pop-ups to appear properly:

1. Clear Cache and Cookies: Sometimes, stored temporary files can cause app features to malfunction in browsers. On Windows browsers, clearing cache and cookies might solve the flashing and disappearance issue.

2. Check Browser Permissions: Ensure the app or website has the necessary permissions to access your camera for scanning barcodes. Sometimes, pop-ups or scan sections won’t appear if camera access is blocked.

3. Update or Restart Browser: Since you’re using a WebKit-based browser on Windows 10, make sure it is updated to the latest version. Also, restarting the browser completely can clear minor glitches.

4. Disable Extensions/Add-ons: Browser extensions might interfere with app features. Try opening the app in a private/incognito window, which disables most extensions, and check if the barcode or menu pop-ups work there.

If after these steps the problem persists, I can guide you with more specific or advanced troubleshooting related to app settings, account checks, or possible software conflicts. Could you let me know if you’ve tried any of these steps already? Also, any error messages or specific behaviors you notice would be helpful.

Looking forward to your reply!