Notes Application not able to open after upgrading to MacOs Sierra I have Macbook Pro 15" Retina display. I recently upgraded to macOS Sierra from El Capitan.  After upgrading, I am no longer able to open my Notes application. 

I have important data on Notes; how can i recover or can fix this issue ? 



Please check it out and please help me what should i do.
Thanks
I had an old mail account which doesn't work any more, but in the System Preferences -&gt; Internet Accounts preference pane in the Use With list Notes were switched on for this account. After I turned it off I was able to launch Notes.