I installed EE3 via GOG Galaxy and when pressing start, the button turns grey for a few seconds and then goes back to normal. No error message, nothing.
I clicked on repair but this didn't solved the issue.

A quick search told something about PhysX but the latest version is installed and manual installing doesn't work. I tried copying a local PhysXLoader.dll into system32 but I won't donwload a dll from the internet from some random site.

Some quick System Infos, when they matter:
OS: Win 10 Pro 64bit
CPU: Ryzen 9 3900X
GPU: RTX 2070 Super
RAM: yes
Soundcard: yes
Displays: 2