'n.map is not a function' error - line 441 of SlideDeck.js

[sqlsolver]

React app will not load. Console error:

react-dom.production.min.js:4203 TypeError: n.map is not a function
    at t.value (SlideDeck.js:441)
    at Ao (react-dom.production.min.js:3796)
    at Do (react-dom.production.min.js:3979)
    at vi (react-dom.production.min.js:4624)
    at yi (react-dom.production.min.js:4642)
    at Zi (react-dom.production.min.js:4905)
    at Yi (react-dom.production.min.js:4863)
    at qi (react-dom.production.min.js:4854)
    at $i (react-dom.production.min.js:4813)
    at wi (react-dom.production.min.js:4741)

with error in SlideDeck.js at line #441:

      }, _react2.default.createElement(Wrapper, _extends({}, this.state, {
        slides: slides,
        width: width,
        height: height,
        update: this.update
      }), _react2.default.createElement(_GoogleFonts2.default, null), _react2.default.createElement(_Carousel2.default, {
        index: index
      }, slides.map(function (Component, i) {         //THIS IS 441
        return _react2.default.createElement(_Slide2.default, _extends({
          key: i,
          id: 'slide-' + i
        }, context, {
          index: i,
          className: 'Slide',
          active: i === index,
          metadata: metadata[i]
        }), _react2.default.createElement(Component, null));

Possibly related to #174 in this repo, and CRA #5149. Used customize-cra and react-app-rewired, as well as your suggestion to install babel-core@7.0.0-bridge.0.

[jxnblk]

Are you using the mdx-deck/loader and not the official mdx loader?

[sqlsolver]

Yes. If you want to take a look I invited you to collaborate. It's a pretty bare bones app still.

[iamstarkov]

@sqlsolver is your repo private? could you open it for public?

[sqlsolver]

@iamstarkov I invited you.

[jxnblk]

Not sure what the issue was here. Hopefully it's no longer an issue, but if you're still running into problems, please provide a reproduction in a public repo