NextJS 7+ needs app.prepare()

[Maxwell2022]

I had to add app.prepare() using nextJS 7+

Hopefully it will help anyone facing the same issue:

// server.js
...
const app = next({ dev });

function createServer() {
  const server = express();
  ...
  server.get('*', (req, res) => handle(req, res));
  return server;
}

if (isInLambda) {
  module.exports = { app, createServer };
}
...

// lambda.js
const serverless = require('serverless-http');
const { app, createServer } = require('./server');

const binaryMimeTypes = ['*/*'];

exports.handler = (event, context, callback) => {
  app.prepare().then(() => {
    const server = createServer();
    const handler = serverless(server, {
      binary: binaryMimeTypes,
    });

    return handler(event, context, callback);
  });
};

[LoganArnett]

I am having an issue with Next7 as well but I am still using the aws-serverless-express package, would this be related?