File-Import in 4.1.1 not working

[on3iro]

Hey,

I just tried to start a new mdx-deck project with the latest version. As long as I keep everything inside a single deck file, it seems to work correctly. However as soon as I split my deck into multiple files, I get the following error:

Uncaught TypeError: Cannot read property 'pathname' of undefined
    at deck.js:41
    at commitHookEffectListMount (react-dom.development.js:19732)
    at commitPassiveHookEffects (react-dom.development.js:19770)
    at HTMLUnknownElement.callCallback (react-dom.development.js:189)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:238)
    at invokeGuardedCallback (react-dom.development.js:293)
    at flushPassiveEffectsImpl (react-dom.development.js:22854)
    at unstable_runWithPriority (scheduler.development.js:653)
    at runWithPriority$1 (react-dom.development.js:11040)
    at flushPassiveEffects (react-dom.development.js:22821)
    at react-dom.development.js:22700
    at workLoop (scheduler.development.js:597)
    at flushWork (scheduler.development.js:552)
    at MessagePort.performWorkUntilDeadline (scheduler.development.js:164)

If I use the same folder structure with a CodeSurfer-Project (so a project kickstarted with their scaffolding mechanism) everything seems to work fine (except from a few major styling issues). Though CodeSurfer still uses v3.x.x under the hood.

Here's a screenshot of my setup (project structure as well as both files):

Note: I tested both with the latest Chrome as well as the latest FireFox DevEdition.

As it stands I am unable to get a usable mdx-deck 4.x.x-setup running. (my presentations are quite large, so keeping everything inside one file is a no-go).

Any ideas?

Thanks in advance

Theo