Spotify hasn't work almost for a week now. Each time I opened the page it shows warning message saying "Error 500: Someone put a frog in our services. Sorry about that!". I tried to launch it in incognito window, cleaned cookies, but it doesn't work.
This bug was due to certain users that had some updated Terms and Conditions but have not accepted them yet. We apologize for not catching the bug earlier, but we have deployed a fix and you should be able to login to the web player again.