Difficult to check the BIOS version without physical rearrangement and attaching keyboard and monitor, but I doubt that it’s anything later than 0054.
BTW, did you see this comment in the release notes for 0060:
Fixed the “no boot device found” issue when Intel® Optane™ Memory is enabled in the BIOS and a SATA device is being used.
You haven’t got the Optane option enabled, have you? (clutching at straws here…)
@danny is working on a Roon OS version 2 that should move away from the need for Legacy boot, but as usual, he won’t commit to a timescale for release - he’s learned his lesson.