HomePod mini can't find anything in Apple Music

Since yesterday, every time I ask my HomePod mini to play an artist, album or song, Siri says "I can't find that in Apple Music". I've already tried restarting the device, even unplugging the device for a minute, but it didn't fix that. My HomePod has the last version so far (15.4.1). It is very strange because a few days ago Siri did respond well to music commands. Is anyone else having this problem?