Deezer usage help: Do I need to "sign in" to use any function?

I can Search, but I can’t play a song, nor radio. Do I need to sign in first? I used a Facebook account, which doesn’t work here either.

Let’s use an example: I am not signed in. I use Search, and retrieve some album. I click on the album, and see a list of songs. If I move onto a song name and click Play button, I get a spinning arrow of doom with blank screen. If I OK the song first, I see a speaker icon left of the song name, there’s a time bar at the bottom with 00:00:00/00:00:00 and the bar+speaker icon times out after a while.

Apparently the song pops up as a Now Playing on the top bar, but of course the song is not actuall yplaying.