TypeError: Cannot read property 'internal' of null

[alhansrisuk]

Created a deck template with mdx-deck and am running into issues with theming, layouts, and hot-reloading. If I make a change in my .mdx file and save it, it will give me this error:

The only thing I have as a devDependency is mdx-deck.

Also, i'm having issues with theming to work as well. I have this line at the top of my .mdx file to use the future theme:
export { future as theme } from 'mdx-deck/themes'
but then I run npm start and it looks like I get console errors here:

[alhansrisuk]

Also with Layouts, after npm start I get this error in the browser:

[jxnblk]

Duplicate of #598