The following error shows up in the browser console:
react-treeview.js:19 Uncaught TypeError: Super expression must either be null or a function, not undefined
at _inherits (react-treeview.js:19)
at react-treeview.js:30
at Object._typeof (react-treeview.js:104)
at __webpack_require__ (bootstrap f721391…:19)
...
The following error shows up in the browser console: