Android Synchronization Errors
Sometimes you are trying to synchronize your account to a specific application but it seems to be impossible to do so. Sometimes the application does not show you what the problem is, so you are not sure what to do. When you have sync errors there are certain steps you should follow:
The solution
First of all, make sure you are connected to the Internet. You also need to check if the services you're trying to sync (like Google or Dropbox) are working, too. Another thing you should do is verify your password, check if it is correct and try again. If none of this works, completely delete your account from your device and add it again.