Google Play Music stopped working in 7.0 - Mavericks. What can i do about that?

Hi,
I already consulted Google but after some emails they said that they couldn't help me and I should contact the browser support.

Here I am.

I think I listened to music after i updated to maverick but I'm not quiet sure... There are two types of errors:The

1. The loading icon on the song will spin forever but the song will never actually start playing.

2. I click on "play" but an error message pop up right away with:"An unknown error occurred, please reloade this page. If the errors still remains contact the support."

Google told me to reinstall Safari but I don't feel comfortable doing that...

Any ideas?