ERROR 404 with a different distDir in next.config.js and Firestore

[sarovin]

Hi,
I want create a web app with redux-saga and firestore.
I have created a repo based on with-firebase-hosting here => https://github.com/Bolket/next-firebase-functions/tree/withSaga.

My next.config.js

module.exports = { distDir: '../../build/functions/next' };

If i remove next.config.js it works fine but with a different distDir I have this message in console => Warning: Expected server HTML to contain a matching <h1> in <div>. and the server send a 404 error.

Steps to Reproduce (for bugs)

1. Clone this repo => https://github.com/Bolket/next-firebase-functions/tree/withSaga
2. yarn
3. yarn next

Your Environment

Tech	Version
next	4.4.0-canary.3
node	8.9.3
OS	MacOS
browser	Chrome 63.0.3239.132

[sarovin]

It works also by removing import '@firebase/firestore'; 😕 but it's important for me...

[sarovin]

I think that the problem is this => firebase/firebase-js-sdk#221
I have solved by updating firebase...