Etcher stuck in initializing device with Revolution Pi Core S (Compute Module 4)

I’m currently testing out the Revolution Pi Core S, which is a replacement for Revolution PI Core3(+). To flash the Core3 I always used Etcher, but with this new device and compute module 4 Etcher is always stuck in the “initializing device” and does not complete when I try to select a device.
Do you guys have any idea what could be wrong? I installed the newest rpiboot_setup.exe, which was enough for the old model.