1) Try to play a new song
2) Get prompted that that's only available with Pandora Premium
3) Say OK and opt-in to the trial
4) Trial expires
5) Pandora never works again
No amount of refreshing, shift-refreshing, restarting or clicking other stations or the Play button will ever play music; the Play button fails and no music plays.
Moderator Edit: Changed title for clarity
To fix, in Chrome:
1) Logout of Pandora
2) Hit F12 to open Developer Tools
3) Click the Application tab at the top
4) Click the Clear Storage side-tab on the left
5) Click Clear site data button
6) Close this tab of Pandora, which will implicitly close Dev Tools
7) Open Pandora again, login, should play music again
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