I’m running Spotify version and  local mp3 files don’t play anymore.

All I get from the logs is “15:58:39.156 I [audio_driver_linux.cpp:18 ] Using PulseAudio”, no proper error message 🙁

After some googling, the fix was simple enough. Install the “ffmpeg-compat” package from the office repo.

sudo pacman -S ffmpeg-compat

Restart spotify and your local mp3 files should now play in your Spotify client.

Source: ArchWiki