Rails server exiting immediately after starting <Undefined method>
<p>I have a strange issue. I just configured a rails project on a remote server. But immediately after I run 'rails server' command I get this error:</p>

<pre><code>[pediatric-nutri]# rails server
=&gt; Booting WEBrick
=&gt; Rails 4.1.16 application starting in development on http://0.0.0.0:3000
=&gt; Run `rails server -h` for more startup options
=&gt; Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)
=&gt; Ctrl-C to shutdown server
Exiting
/home/lookwhat/rails_apps/pediatric-nutri/app/controllers/application_controller.rb:5:in `&lt;class:ApplicationController&gt;': undefined method `decent_configuration' for ApplicationController:Class (NoMethodError)
    from /home/lookwhat/rails_apps/pediatric-nutri/app/controllers/application_controller.rb:1:in `&lt;top (required)&gt;'
    from /usr/local/rvm/gems/ruby-2.3.1/gems/activesupport-4.1.16/lib/active_support/dependencies.rb:443:in `load'
</code></pre>