Can't run my build ->Failed to open descriptor file!

Hello!
I’m trying to package and build my game for Windows in engine version 4.8.
The packaging goes without any errors. However, when I try to launch my application, I get this error: Failed to open descriptor file ‘…/…/…/mygame/mygame.uproject’

This doesn’t even make sense to me since the packaged game does not even come with a uproject file… how can I fix this?

I’ve packaged it for ‘shipping’.
All other topics around this issue seem to focus on other platforms, Mac and Android being mentioned several times.
But even if I exclude these from the project config, the error persists. Even after restarting my computer.
Has any1 an idea what’s causing this?

Okay, it appears to be happening because of Rama’s Vertex Plugin. As soon as I disable it, the project can be built and run.