TypeError: Class constructor [X] cannot be invoked without 'new'

[jwbackhouse]

I am trying to migrate a large existing React project from Webpack to Snowpack, and am encountering the following error:

TypeError: Class constructor LanguageView cannot be invoked without 'new'
    at new WrappedComponent (http://localhost:8080/_snowpack/pkg/react-css-modules.v4.7.11.js:437:58)
    at new LanguageView (eval at ES6ProxyComponentFactory (http://localhost:8080/_snowpack/pkg/react-hot-loader.v4.13.0.js:367:10), <anonymous>:14:7)
    at constructClassInstance (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:11002:18)
    at updateClassComponent (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:14262:5)
    at beginWork (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:15139:16)
    at performUnitOfWork (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:18333:12)
    at workLoop (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:18367:24)
    at HTMLUnknownElement.callCallback (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:159:14)
    at Object.invokeGuardedCallbackDev (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:209:16)
    at invokeGuardedCallback (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:266:31)
    at replayUnitOfWork (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:17619:5)
    at renderRoot (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:18483:13)
    at performWorkOnRoot (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:19346:7)
    at performWork (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:19258:7)
    at performSyncWork (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:19232:3)
    at requestWork (http://localhost:8080/_snowpack/pkg/react-dom.v16.8.6.js:19101:5)

LanguageView is a React class component that in its simplified form looks like this:

import React, {Component} from 'react';
import {connect} from 'react-redux';
import CSSModules from 'react-css-modules';
import styles from './styles.scss';

class LanguageView extends Component {

  render() {
    const {children} = this.props;

    return (
      <div styleName='outerContainer'>
        <div>
          <div id='modalContainer'/>
          <div id='nestedModalContainer'/>
          <div id='nestedNestedModalContainer'/>
        </div>
        {children}
      </div>
    );
  }
}

const mapStateToProps = (state) => ({
  language: getAdminLanguage(state),
  groupLanguage: getSelectedGroupLanguage(state)
});

export default connect(mapStateToProps)(CSSModules(LanguageView, styles, {allowMultiple: true}));

react-css-modules is a (now deprecated) library enabling CSS modules via use of a React higher order component.

I've drawn a blank on research into similar issues seen by other users of this library and similarly with Snowpack users (including discussion #1669, so wondered if someone might have some suggestions...