If you see the message 'Bad Authentication Data', just don't be panic. It is because of you haven't filled all required data for twitter feed yet. You can easily disable this message by going to admin panel > overall elements > footer/copy right , then turn twitter feature off... But if you're using twitter feed, make sure that you follow these steps :)
Bad Authentication Data / Using twitter widget
1.) New twitter API requires you to setup the application before pulling the feed out. To achieve this, go to
and logging in with your twitter account.
2.) Click create new application
3.) Click to create the access token, then refresh the page.
4.) Fill the data into the widget
5.) Put all info in admin panel 'overall elements > Footer/copyright'(Exist in some themes). And/or in Twitter widget setting.