I was recently editing a website with Drupal 7 installed, and was integrating twitter feed.
- I created a block twitter_feed_block and assigned the block to the content section of the front page. It worked fine.
- Then I tried to move to twitter_feed_block to multiple places (like right sidebar, header, menu etc). This move caused multiple contents on the main page to disappear.
Now every link in the website is showing a white screen. Sadly i tried to log out and login again and found the login at WEBSITE/user has also disappeared.