Nuxt.js 2.2.0 - Fix Error Cannot stringify arbitrary non-POJOs

axios-middleware.js

/**
* plugins/axios-middleware.js
*/

import axios from 'axios';

axios.interceptors.response.use(response => {
    if( typeof response.data === 'object' && response.data.constructor !== Array ) {
        response.data = Object.assign({}, response.data);
    }
    return response;
});

nuxt.config.js

process.env.DEBUG = 'nuxt:*';

module.exports = {
  ........
  plugins:  [
    '@plugins/axios-middleware.js', <---- Add the middleware to nuxt config in plugins section
    .......
  ],
  modules: [
    .....
  ],
  .......
  /*
  ** Build configuration
  */
  build: {
    ......
  }
};