title: Axios error when on run generate Nuxt project
body: <p>Building my nuxt project using:</p>
  <pre><code>npm run build 
  </code></pre>
  <p>which completes. I then:</p>
  <pre><code>npm run generate
  </code></pre>
  <p>and get the following errors. Can anyone point me in the right direction to fix these?</p>
  <pre><code>ERROR  Request failed with status code 403
  
  at createError (node_modules/axios/lib/core/createError.js:16:15)
  at settle (node_modules/axios/lib/core/settle.js:17:12)
  at IncomingMessage.handleStreamEnd (node_modules/axios/lib/adapters/http.js:260:11)
  at IncomingMessage.emit (events.js:327:22)
  at IncomingMessage.EventEmitter.emit (domain.js:467:12)
  at endReadableNT (internal/streams/readable.js:1327:12)
  at processTicksAndRejections (internal/process/task_queues.js:80:21)
  
  ✔ Client-side fallback created: 200.html
  ✔ Static manifest generated
  
  ERROR  Request failed with status code 500
  
  at createError (node_modules/axios/lib/core/createError.js:16:15)
  at settle (node_modules/axios/lib/core/settle.js:17:12)
  at IncomingMessage.handleStreamEnd (node_modules/axios/lib/adapters/http.js:260:11)
  at IncomingMessage.emit (events.js:327:22)
  at IncomingMessage.EventEmitter.emit (domain.js:467:12)
  at endReadableNT (internal/streams/readable.js:1327:12)
  at processTicksAndRejections (internal/process/task_queues.js:80:21)
  
  ERROR  Request failed with status code 500
  
  at createError (node_modules/axios/lib/core/createError.js:16:15)
  at settle (node_modules/axios/lib/core/settle.js:17:12)
  at IncomingMessage.handleStreamEnd (node_modules/axios/lib/adapters/http.js:260:11)
  at IncomingMessage.emit (events.js:327:22)
  at IncomingMessage.EventEmitter.emit (domain.js:467:12)
  at endReadableNT (internal/streams/readable.js:1327:12)
  at processTicksAndRejections (internal/process/task_queues.js:80:21)
  </code></pre>