Since about 2 weeks, I just can't add tracks to playlist or starred playlist with Spotify web player.
When I click on "add to" and select a playlist, nothing appen and the track is not added.
I thought it was because of uBlock i downloaded recently but I tried on firefox without it and it didn't work too.
However it works with the app on my Iphone, so I think it comes from the web player.
Thanks for your help.