title: amp-list component error in amp for email
body: <p>I am new to AMP for Email and I am trying it out now! I am using the amp-list component in my email body to fetch the remote server json content. But I am getting the below js error when i checked in my browser console. Also in my Gmail inbox in the mail I received its blank.</p>
  
  <pre><code>Uncaught (in promise) Error: Class$obf_1013: [https://dynamicmail-pa.googleapis.com/v2/xhrs:proxy?alt=protojson] ti: Unsupported HTTP status: 400: Class$obf_1011: [object Object]
  
  template-impl.js:241 Error proxying amp-list templates: Request viewerRenderTemplate failed: Error: Class$obf_1013: [https://dynamicmail-pa.googleapis.com/v2/xhrs:proxy?alt=protojson] ti: Unsupported HTTP status: 400: Class$obf_1011: [object Object]​​​
  </code></pre>