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Can you try re-entering your password, please?
If this doesn't help you sort this out, I'd recommend you to clear the app's data (Settings > Apps > GO > Clear data). Please note, that this will delete your personal information, e.g. My Places, My Routes and destination prediction data. You can save and restore My Places with MyDrive.
Yesterday i had problems with the traffic. So i tought i will log out and then log in. But there wasn't connection with the server. So i delete the whole app and re-install. But now i'm stuck on the loading screen. I have tried everything what tomtom says on the forum.
Anyone who can help me?