heroku-cli: This CLI is deprecated.
 !    Heroku client internal error.
 !    Search for help at: https://help.heroku.com
 !    Or report a bug at: https://github.com/heroku/heroku/issues/new

    Error:       no implicit conversion of nil into String (TypeError)
    Command:     heroku rurn rake db:migrate
    Plugins:     heroku-pg-transfer
    Version:     heroku-gem/3.43.9 (i686-linux) ruby/2.2.3
    Error ID:    12ce2dbfcae04cedba276fb1aec8f738


    More information in /home/yuva/.heroku/error.log

 wget -qO- https://cli-assets.heroku.com/install-ubuntu.sh | sh