title: Error: uninitialized constant FFI::Platform::CPU on starting jekyll server
body: <p>I got the below error on trying to start Jekyll server</p>
  
  <blockquote>
    <p>Error:  uninitialized constant <code>FFI::Platform::CPU</code></p>
  </blockquote>
  
  <p>I tried reinstalling Jekyll server and its dependencies, but no luck. Could someone help me to get around this issue? Thanks.</p>
  
  <p>I am using <strong>ubuntu=18.04</strong>, <strong>jekyll=3.8.6</strong></p>
  
  <pre><code>anil@anil:~/customer-churn$ jekyll serve
  
  
  Configuration file:
    ~/customer-churn/_config.yml
    Source: ~/customer-churn
    Destination: ~/customer-churn/_site
    Incremental build: disabled. Enable with --incremental
  Generating... done in 0.597 seconds.
  
  jekyll 3.8.6 | 
  Error:  uninitialized constant FFI::Platform::CPU
  </code></pre>