Alsa busy with spotify

I have installed volumio on a Dell laptop, and I use the Fiio X3 as an external dac. Everything works beautifully. Both my audio library and web radio work fine. I have installed the Spotify plugin and I am able to see my playlists. But when I start a song from Spotify, the scroll bar tells me that the song is playing but there is no audio. If I then try to listen to a song from my library on the hard disk or a song form the web radio, I get the message “ALSA error … resource busy”. What can I do to listen to my Spotify songs? "

Volumio Information

Volumio Version: 2.861
Hardware: PC Intel
DAC: Fiio X3 in DAC mode