"this song is not currently available in your country or region", but only in library
I have a problem with several songs (for example Жальменіна by Go_a), which are available to play after finding them using 'Search' function, but appear greyed out in playlist with an error message "this song is not currently available in your country or region". It is exactly the same song, as I've been trying to add precisely the one I was listening to. How can I add such song to playlist and why does this happen? The same thing happens when it is added to the library. It happens only for individual songs. The rest from this artist is available and working both under search and in library.
Below follow the screens showing that I am indeed able to play the song, but appears like that both in playlist and library itself: