Not able to Install ZimaOS on a Fujitsu Futro S920

Hello everyone,
I’m having trouble installing ZimaOS on a Fujitsu Futro S920.

I can run the installation, but the system can’t find the boot partition.
Reboot and select proper boot device

Unfortunately, I can’t figure out what’s wrong; I followed the installation guide exactly.
I’ve attached some screenshots of the BIOS settings—maybe I’m missing something.

I hope you can help me.