Please turn off the setting that blocks browser pop-ups.

If you don't do this, Spotify will  not run properly, and you won't be able to pop out the music player.

To do this, go to chrome://settings/content/popups and click on "always allow pop-ups and redirects."

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IF SETTINGS IS BLOCKED ON YOUR COMPUTER
Use the shortcut "crt+shift+backspace" to acces the "delete history setting". Click cancel, then go to the previously mentioned settings page. (Just search up "pop-ups")