Hi there! Thanks for reaching out. I understand you've downloaded the Staples app but when you try to sign in, it prompts you to use the www.staples.com website instead. I'd like to get a bit more info so I can help you better:

- Are you able to use your Staples account credentials successfully on the Staples website?
- Is the app showing any specific error message besides asking you to sign in on the website?
- Have you tried restarting the app or signing out and back in if possible?

Often, this issue can happen if the app or account experiences a sync hiccup or there's an update that changes login procedures.

In the meantime, here’s a straightforward set of steps you can try to resolve this:

1. Close the app completely: Make sure the app is fully closed, not just minimized.
2. Clear app cache (if possible): On Windows, if it’s an app you downloaded from the Microsoft Store, you can go to Settings > Apps > Staples App > Advanced options and try "Reset."
3. Check for app updates: Open the Microsoft Store and see if the app needs an update. Sometimes login issues are fixed in new releases.
4. Try signing in on the web: Go to www.staples.com using your WebKit browser on Windows and verify that your username and password work there without issues.
5. Reinstall the app: If steps above don’t help, uninstall and reinstall the app, then try signing in again.

If after trying these you’re still prompted to sign in via the website, it might be a temporary change or restriction in the latest app updates—some users have reported needing to verify via email codes or logging in on the site first before the app synchronizes1.

Could you give those steps a try and let me know how it goes? I’m here to help you get this sorted out.