It used to work till yesterday. Suddenly i am facing this problem in my app. When user clicks on login with twitter button i cam calling this end point

https://api.twitter.com/oauth/authenticate?oauth_token=xxxxxxxxx

then it shows Nothing to see here page. Any changes in twitter not sure. I have been searching for this problem from last 2 hours. I tried changing the oauth_token to some test app still i see nothing to see here page from twitter.