title: Strapi error after restarting server - "Error: Cannot find module 'strapi-utils'"
body: <p>I was experiencing an issue in the strapi backend trying to use to content builder, so quit the server and went to restart and I got the following error:</p>
  
  <pre><code>Error: Cannot find module 'strapi-utils'
    Require stack:
    - /usr/local/lib/node_modules/strapi/bin/strapi.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:797:15)
    at Function.Module._load (internal/modules/cjs/loader.js:690:27)
    at Module.require (internal/modules/cjs/loader.js:852:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.&lt;anonymous&gt; (/usr/local/lib/node_modules/strapi/bin/strapi.js:13:17)
    at Module._compile (internal/modules/cjs/loader.js:959:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
    at Module.load (internal/modules/cjs/loader.js:815:32)
    at Function.Module._load (internal/modules/cjs/loader.js:727:14)
    at Function.Module.runMain (internal/modules/cjs/loader.js:1047:10) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/usr/local/lib/node_modules/strapi/bin/strapi.js' ]
  </code></pre>
  
  <p>I have tried reinstalling strapi-utils (npm i strapi-utils) but still throwing the error. What else can I try. Was working wonderfully up until this. Just does not want to restart now!!</p>
  
  <p>Thanks in advance, 
  Tom </p>