I have a Next.js application that has React components in the pages directory that render as expected. The application was built for a rails backend api and is using that backend every day properly. I am trying to add a twilio video chat to the app. I created an /api directory as instructed in all documentations. When I attempt to make a call to this api for literally a mock example to test the api I get the error in the terminal Error: The default export is not a React Component in page: "/api/twilio" at Object.renderToHTML (/home/application_in_question/node_modules/next-server/dist/server/render.js:117:19)
and I also get Failed to load resource: the server responded with a status of 500 (Internal Server Error) in the browser. I was not part of the team that built this application so I am unsure of why I cannot add this Next.js api. The api is the selling point of Next and it is supposedly built into the framework.
I get this error is I just put the route in the address bar of the browser but I also get it from a file api call.
pages/twilio/index.js
  const handleFetchPosts = async () => { 
  debugger
  const tokenResponse = await fetch("/api/twilio"); 
  debugger
  const tokenData = await tokenResponse.json(); 
  debugger
  setToken(tokenData);
  }; 
section of package.json
"next": "^8.1.0",
"next-auth": "^1.8.5",
"next-compose-plugins": "^2.2.0",
"next-redux-wrapper": "^2.0.0",
"next-routes": "^1.4.2",
"next-seo": "^1.11.2",
"node-sass": "^4.12.0",
pages/api/twilio/index.js
console.log("running api")
const handler = (req, res) => {
    return res.json({ hello: 'world!' });
  };
  export default handler;
next.config.js
 const { withPlugins, optional } = require('next-compose-plugins')
// eslint-disable-next-line import/no-extraneous-dependencies
const { PHASE_PRODUCTION_BUILD } = require('next-server/constants')
const sass = require('@zeit/next-sass')
const { requireEnvVar } = require('./lib/utils')
  Custom Next.js Configuration
  @see https://nextjs.org/docs#custom-configuration
 const nextConfig = {
  Runtime configuration
  @see https://nextjs.org/docs#exposing-configuration-to-the-server--client-side
  publicRuntimeConfig: {
// Will be available on both server and client
    apiUrl: requireEnvVar('API_SERVER'),
    googleApiKey: requireEnvVar('GOOGLE_API_KEY'),
    stripeApiKey: requireEnvVar('STRIPE_PUBLISHABLE_KEY'),
    instantPayFee: requireEnvVar('INSTANT_PAY_FEE'),
  },
   Disable file-system routing
  @see https://nextjs.org/docs#disabling-file-system-routing
 
  **useFileSystemPublicRoutes: true,**
    Custom webpack config
    @see https://nextjs.org/docs#customizing-webpack-config
   webpack(config, { webpack }) {
  Only load specific locales for moment.js
  @see https://stackoverflow.com/a/25426019/956688
 
    config.plugins.push(
      new webpack.ContextReplacementPlugin(/moment[/\\]locale$/, /en/)
    )
    return config
  },
}
     Load multiple plugins with next-compose-plugins
     @see https://github.com/cyrilwanner/next-compose-plugins
    module.exports = withPlugins(
      [
        [sass],
      Analyzing the webpack bundle
         @see https://github.com/zeit/next-plugins/tree/master/packages/next-bundle-analyzer
 
       Load @zeit/next-bundle-analyzer as an optional plugin only during production build
       @see https://github.com/cyrilwanner/next-compose-plugins#optional-plugins
       @see https://github.com/cyrilwanner/next-compose-plugins#phases-array
 
        [
      // eslint-disable-next-line global-require,import/no-extraneous-dependencies
      optional(() => require('@zeit/next-bundle-analyzer')),
      {
    analyzeServer: ['server', 'both'].includes(process.env.BUNDLE_ANALYZE),
        analyzeBrowser: ['browser', 'both'].includes(
          process.env.BUNDLE_ANALYZE
        ),
        **bundleAnalyzerConfig: {
          server: {
            analyzerMode: 'static',
            reportFilename: '../../bundles/server.html',
          },
          browser: {
            analyzerMode: 'static',
                reportFilename: '../bundles/client.html',
              },
            }**,
          },
          [PHASE_PRODUCTION_BUILD],
        ],
      ],
  nextConfig
)`
As you can see above the team before me had useFileSystemPublicRoutes set to false. I have made this true.
When I attempt to fetch the api in the react page or use a get request in the browser for the api/index.js file I created with the code
`
 console.log("running api")
                                                                                           
const handler = (req, res) => {
    return res.json({ hello: 'world!' });
    };
    export default handler;` 
This gives the error above. This is a very simple example that I have seen work in numerous resources online so I do not understand why this is happening.
How can I get this api to work???
** I added the ** in an attempt to highlight the parts I think could help. I already set useFileSystemPublicRoutes to true.
