Importing addToMailchimp throws error with fs dependency not found about gatsby-plugin-mailchimp HOT 5 CLOSED

// mailchimp.js, in the components dir

import React from 'react'
import addToMailchimp from 'gatsby-plugin-mailchimp'

class MailChimp extends React.Component {
	constructor(props) {
		super(props)
		this.state = {
			email: ``,
		}
	}

	// Update state each time user edits their email address
	_handleEmailChange = e => {
		this.setState({ email: e.target.value })
		console.log(this.state.email)
	}

	_handleSubmit = e => {
		e.preventDefault
		addToMailchimp(email, listFields)
			.then(data => {
				// I recommend setting data to React state
				// but you can do whatever you want
				console.log(data)
			})
			.catch(() => {
				// unnecessary because Mailchimp only ever
				// returns a 200 status code
				// see below for how to handle errors
			})
	}

	render() {
		return (
			<form onSubmit={::this._handleSubmit(email, { listFields })}>
				<input
					type="email"
					name="email"
					placeholder="[email protected]"
					onChange={::this._handleEmailChange}
				/>
			</form>
		)
	}
}

export default MailChimp

// gatsby-config.js

require('dotenv').config()

module.exports = {
	siteMetadata: {
		title: 'XXXXX',
	},
	plugins: [
		`gatsby-plugin-react-helmet`,
		`gatsby-plugin-styled-components`,
		`gatsby-transformer-sharp`,
		`gatsby-plugin-sharp`,
		`gatsby-transformer-remark`,
		{
			resolve: 'gatsby-plugin-mailchimp',
			options: {
				endpoint:
					'https://tech.us10.list-manage.com/subscribe/post?u=XXXXXXX',
			},
		},
		{
			resolve: `gatsby-source-filesystem`,
			options: {
				name: `img`,
				path: `${__dirname}/src/assets/img/`,
			},
		},
		{
			resolve: `gatsby-source-contentful`,
			options: {
				spaceId: process.env.CONTENTFUL_SPACE,
				accessToken: process.env.CONTENTFUL_TOKEN,
				host: process.env.CONTENTFUL_HOST || `cdn.contentful.com`,
			},
		},
	],
}

exports.onCreateWebpackConfig = ({ actions }) => {
  actions.setWebpackConfig({
    node : {
      fs : "empty"
    }
  })
};