Hi, see my attached screenshot from Activity Monitor, which shows Spotify as preventing my Mac from going into either screensaver or sleep mode.
I just upgraded to El Capitan. Did not have this problem on Yosemite. And cannot find any Spotify settings to prevent this from happening. It happens even when no music is playing in Spotify whatsoever, just so long as it's open.
Please fix or fill me in on how to remedy this for myself.