There are a few measures you may do to attempt to remedy the problem if YouTube Premium not Working for you. Here are some tips for troubleshooting:

Verify your internet connection. Ensure that your internet connection is steady and dependable. To test if it helps, you might try rebooting your modem or router.

Clear cache and data: If you're having problems using the YouTube app on a mobile device, try deleting the cache and data. Locate the YouTube app under the "Apps" or "Application Manager" part of your device's settings, then delete its cache and data. You will need to sign in again since clearing data will log you out of the app.

Make sure you're running the most recent version of the YouTube app by updating it. Check to see if there is an update for the app by going to the Google Play Store (for Android) or the App Store (for iOS). If there are any updates, install them.

Restart your device: Restarting your device might occasionally fix short-term malfunctions or problems. Completely switch off your gadget, let it a few while to cool, and then turn it back on.

Check the status of your subscription: Check to see if your YouTube Premium membership is valid and current. Check to see if the payment was successful if you recently changed your payment method.

Speak with YouTube support: You can contact YouTube Premium customer service department for more help if none of the aforementioned solutions work. They can assist you in resolving the problem and will have access to particular troubleshooting procedures.

Please note that depending on your device and operating system, the precise procedures to resolve the issue may differ from those suggested here.