Unicode library Error

While installing drupal 7 project on my localhost with php version 5.6 in Ubuntu. I am getting this error continously which is not letting me to install the project.

Multibyte string output conversion in PHP is active and must be disabled. Check the php.ini mbstring.http_output setting. Please refer to the PHP mbstring documentation for more information.

Do anyone know the solution?

Thanks

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/1/feed