I have a motorola tablet with Android operating system, I have had evernote working functionally in the past but for some reason it has decided to stop syncing. I have tried everything except deleting the app and re-installing it. Every time I try to sync my notebooks it says "downloading headers" and then an error occurs and it stops. I have logged out (deleting any unsaved notes) and now I have all empty notebooks on my tablet. What is going on and how to fix it? Thanks!