title: Error starting application with POW - Bundler::GemNotFound
body: <p>I'm using Anvil to manage my local sites. I have several and they all work fine apart from one, my most recent site.</p>
  
  <p>The error i get when i attempt to start it is:</p>
  
  <p><code>Error starting application</code><br>
  <code>Your Rack app raised an exception when Pow tried to run it.</code><br>
  <code>Bundler::GemNotFound: Could not find execjs-2.2.2 in any of the sources</code></p>
  
  <p>Here is my Gemfile:</p>
  
  <pre><code>source 'https://rubygems.org'
  
  gem 'rails', '4.1.4'
  
  gem 'sqlite3', group: :development
  
  gem 'sass-rails', '~&gt; 4.0.3'
  
  gem 'uglifier', '&gt;= 1.3.0'
  
  gem 'coffee-rails', '~&gt; 4.0.0'
  
  # gem 'therubyracer',  platforms: :ruby
  
  gem 'jquery-rails'
  
  gem 'turbolinks'
  
  gem 'jbuilder', '~&gt; 2.0'
  
  gem 'sdoc', '~&gt; 0.4.0',          group: :doc
  
  gem 'spring',        group: :development
  
  gem "twitter-bootstrap-rails"
  gem "simple_form"
  gem "httparty"
  gem 'rails_12factor', group: :production
  gem 'pg', group: :production
  </code></pre>
  
  <p>I've had a look through questions on SO and google but haven't been able to figure it out.</p>
  
  <p>I'm using RVM version 1.25.28</p>
  
  <p>Thanks</p>