I've been having an issue for the past six months where seemingly random albums and songs will not play on Spotify desktop. It is quite frustrating to click a song/album that is not greyed out and have it not play. I get the error message 'This song is not available. If you have the file on your computer you can import it'. Some specific examples include half of Lykke Li's 'I Never Learn' album, half of Whitney Houston's self titled album and Janet Jackson's 'The Velvet Rope' album. Sometimes songs that I used to be able to play will no longer play.
It is not a country-based issue as I can play the exact same songs on my phone and iPad. I've had friends test out the same albums and they have no issues.
I have re-installed the program several times and I am using the latest version of Spotify and my Mac OS.