The most common culprit is a weak internet connection. Open any other video or webpage — if that loads slowly too, the problem is on your network side. Try switching from Wi-Fi to mobile data or vice versa. If the connection seems fine, clear the app cache: on Android go to Settings → Apps → YouTube Music → Storage → Clear Cache. On iOS, reinstall the app — there's no manual cache clear.
This usually happens when the app loses connection briefly. Go to Settings inside the app and enable offline mode for your favorite playlists — downloads prevent interruptions. Also check if battery saver or data-saving mode is active on your device; both can throttle background audio.
First, confirm you're using the correct Google account — people often have several. Try signing out and back in. If you see an error like 'This account is not supported', it means your account type (for example, a Google Workspace account with restrictions) isn't eligible for the service in your region.
Give it up to 15 minutes — billing confirmation sometimes lags. If the premium badge still doesn't appear, sign out of the app, sign back in, and check your subscription status at music.youtube.com/paid_memberships. If the charge went through but access didn't activate, contact Google Pay support with your transaction ID.
This is often a temporary index glitch. Try a slightly different query — use the artist name alone instead of a full song title. If search is completely broken across multiple queries, the service itself may be having an outage; wait 10–15 minutes and try again.