Jan Hellar I have been playing with SDK both on emulator and device for the most of the day.
Both development and production version work without issues. !

Screen Shot 2018-05-18 at 4.25.18 PM.png|thumbnail!

What I think may happen is just that some of the plugins or platforms got broken (it happens a lot).
You can try to do fresh clone or execute: https://gist.github.com/wtrocki/1b049b17a358525586148247dc03e5cb

There may be also problem with the build chain. To debug issue you can execute inspector in Safari Developer preview and attach error to ticket.
I will be happy to review it again.

Note: I have removed duplicated plugins which often are causing problems with platform installation.