A lot of people have asked questions about this problem, but it's extremely general and none of the solutions apply to me. After restarting my PC and rerunning webpack, I suddenly get the error in the title in my browser. No code was changed. The undefined module in question is No 188, which seems to be a module bound to both 188 and 189 (189 works just fine). See here:
/***/ }),
/* 188 */,
/* 189 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/* jslint esnext: true */
var src$core$$ = __webpack_require__(190), src$en$$ = __webpack_require__(195);
src$core$$["default"].__addLocaleData(src$en$$["default"]);
src$core$$["default"].defaultLocale = 'en';
exports["default"] = src$core$$["default"];
//# sourceMappingURL=main.js.map
/***/ }),
All configuration and source files are in the repo, including the bundled chunks (node.build.js and main.build.js). I honestly don't know what triggered the issue specifically, the restart is only a guess. It was working perfectly fine beforehand.
