master build broken

[Krist Wongsuphasawat]

I cloned the repo, npm install and npm start.
Going to localhost:8080 yield this error

index_bundle.js:24882 Uncaught (in promise) TypeError: Cannot read property 'length' of undefined
    at _initializeOriginNodes (index_bundle.js:24882)
    at render (index_bundle.js:24848)
    at storyRender (index_bundle.js:24804)
    at iStoryline._layout (index_bundle.js:22033)
    at main (index_bundle.js:13170)
_initializeOriginNodes @ index_bundle.js:24882
render @ index_bundle.js:24848
storyRender @ index_bundle.js:24804
_layout @ index_bundle.js:22033
main @ index_bundle.js:13170
async function (async)
main @ index_bundle.js:13169
(anonymous) @ index_bundle.js:13307
__webpack_require__ @ index_bundle.js:20
(anonymous) @ index_bundle.js:4095
__webpack_require__ @ index_bundle.js:20
(anonymous) @ index_bundle.js:63
(anonymous) @ index_bundle.js:66