No boot device after installation.

I've tried installing Bazzite on an old PC I had laying around.

The PC is using an NVIDIA GTX970 so of course I downloaded the "old nvidia" version of bazzite.

After installation, which completed without errors, I get presented by a no boot device found message from the BIOS.

When I check the BIOS settings, I do see the correct HDD is selected as boot device.

All tips 'n tricks are welcome