Unknown message slot CUSTOM_MSG_HEADER_SEARCH_FIND
Unknown message slot CUSTOM_MSG_HEADER_SEARCH_TIPS
Your TomTom GPS music watch works with music tracks and playlists that you own and that are stored on your computer.
Services like Spotify, Apple Music, Deezer and SoundCloud allow you to listen to music, but you do not actually own the music. Such streaming services do not store music locally on your computer which means they will not work with the TomTom GPS music watch.
If you don't own any music, you may visit the iTunes music store or other music download services to buy tracks and playlists you want.