title: Open Source Canvas - NoMethodError (undefined method `lti_guid'
body: <p>I'm trying to install 'Open Source Canvas' from the following documentation (<a href="https://github.com/instructure/canvas-lms/wiki/Quick-Start" rel="nofollow noreferrer">https://github.com/instructure/canvas-lms/wiki/Quick-Start</a>).</p>
  
  <p>I have it installed, but after starting the server and trying to hit the URL I get a "NoMethodError (undefined method `lti_guid'" error. </p>
  
  <p>/var/lib/gems/2.4.0/gems/activemodel-5.1.6.2/lib/active_model/attribute_methods.rb:432:in `method_missing':</p>
  
  <pre><code>def method_missing(method, *args, &amp;block)
    if respond_to_without_attributes?(method, true)
      super
    else
      match = matched_attribute_method(method.to_s)
      match ? attribute_missing(match, *args, &amp;block) : super
    end
  end
  </code></pre>
  
  <p>I have zero experience in Ruby so this is a bit tricky.</p>
  
  <p><strong>Using:</strong></p>
  
  <p>Ubuntu 18.04.2 LTS</p>
  
  <p>Rails: 5.1.6.2</p>
  
  <p>Gem: 2.6.14.4</p>
  
  <p>Ruby: 2.4.6p354 (2019-04-01 revision 67394) [x86_64-linux-gnu]</p>
  
  <p>Yarn: 1.10.1</p>
  
  <p>PostregreSQL: 10.9</p>
  
  <p>NPM: 6.9.0</p>