Hi there! I understand that you're having trouble playing songs on Qobuz that you've downloaded, even when you have internet access. To help you better, can I ask a couple of quick questions first?

1. Are you using the Qobuz app or playing through a web browser on your Windows device with WebKit?
2. Do these songs show as "downloaded" and available offline in your library?
3. When you try to play the downloaded songs, do you get any error messages or do they just not start playing?

This info will help me pinpoint the cause and find the best fix for you. Meanwhile, here are some common first troubleshooting steps you can try:

1. Make sure the Qobuz app is fully updated to the latest version on your device.
2. Sometimes the downloaded files don’t play unless the app confirms you are signed in online; try briefly connecting to the internet, signing out and back in, then playing again offline.
3. Clear the cache or temporary data in the Qobuz app (under settings) if available, then try playing the downloaded songs again.
4. Confirm that your device storage isn’t full or locked in a way that prevents access to the downloaded files.

If the issue persists after those steps, let me know what happens and we can dig deeper, like checking file formats or your account status. Does that sound good so far?