We'd like to help. Please send us a screenshot of the error to help us understand the issue.
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Thanks for the screenshot. If you are using Chrome, let's try removing Google Play Music extension from it, here's how: https://goo.gl/kmmJ2X . Then add it back form the Chrome Web Store: https://goo.gl/X1yn3m . Keep us posted.
We recommend getting in touch with one of our specialists to sort this out. You can request a call here: https://goo.gl/Q2VZLG . Hope this helps.