Hi, Maarten.
The up-to-date instructions are here. If you are still on my branch “v5touch”, you should switch to “vangelis”. I am not sure if that happens automatically once you do that globally in the webconf, but you can always do git checkout vangelis in /zynthian/zynthian-ui/ if the webconf does fail for some reason.
I got finally some feedback and advice from @jofemodo, so we may be closer to a merge. It looks like I have too eagerly implemented a bit more features than meaningful in the meantime 
, while playing with the platform and experimenting … so that I will have to split the code into more branches and remove the more experimental or controversial “improvements” to get at least the core functionality accepted to upstream by our careful and foresightful arbiters.