No playback of library music but radio works

Hello everyone.
Decided to listen to my music library while sitting home in quarantine. Volumio GUI loads up, the source is visible and is mounted. I can go through all my library but as soon as I select a song to play - nothing happens. Usually there is a green rectangle in the top right corner with info: Playing song “-” but there is nothing being displayed.
Volumio radio plays without any issues with the green rectangle present.
Any ideas?

Where is your library located? NAS, USB, UPNP?

My library is located on NAS, which is my main PC and is being transferred through wired network.

This behavior is possible if library is changed after last scan or not accessible. All library tree is in volumio memory and is updated only at re-scan or update folder command.