Hello @Moniasuka. I'm sorry to say that this means the content is no longer available. This can happen if licencing agreements with the artist/labels, or ownership of rights, has changed. Songs that are grayed out may reappear soon. Thank you.
Hi @RichardTeh. I have similar problem. Some songs on my playlist are unavailable to play even though they are not grayed out. The first one I noticed is Africa by Toto, when I try to play it not only this song doesn't play but the same happens for other songs. When I refresh the playlist it comes back to normal but the same songs still don't want to play. I use Spotify premium.
Hi @Arratyn. Hmm that's quite odd. The song Africa by Toto works fine on my laptop as well as my phone. Do you use Wi-Fi connection or mobile data? Maybe try other connection. Also, have you try restarting your device? Perhaps that will help~ Hit me up if you need further help!