title: Uncaught SyntaxError: Unexpected token u in JSON at position 0
body: <p>Only at the checkout and on individual product pages I am getting the following error in the console log:</p>
  
  <pre><code>VM35594:1 Uncaught SyntaxError: Unexpected token u in JSON at position 0
      at JSON.parse (&lt;anonymous&gt;)
      at run (layout.min.js:9)
      at app.min.js:1
      at main.min.js:2
      at Object.execCb (require.min.js:112)
      at Module.check (require.min.js:56)
      at Module.&lt;anonymous&gt; (require.min.js:72)
      at require.min.js:11
      at require.min.js:74
      at each (require.min.js:3)
  </code></pre>
  
  <p>I am using a one page checkout extension, but when I disable that the error still shows. I thought it might had something to do with the reviews on the product page (as I moved the reviews out of the tabs), but undoing that change didn't fix the error on the product pages.</p>