No boot device available

Hello. I have a similar problem (running 15.1.4 parallels business edition on Catalina 10.15.7, windows 10 guest OS) and "No Boot device is available, press enter to continue" but cannot shutdown windows (ctrl-alt-del doesn't work, no options to shutdown). Suggestions? Thanks.

 

I was finally able to get working, but notice I had to choose SATA: 01. I thought the HD was NVME (on 2020 iMac)
Physical Drive:

Device Name: APPLE SSD AP2048N

Media Name: AppleAPFSMedia

Medium Type: SSD

Protocol: PCI-Express.

 

Please help. Big Sur 11.7.9, trying to get Windows 11 working. First I was faced with UEFI Shell - fixed that, then had "No Boot device is available, press enter to continue" appear. Tried everything I thought of, solution from this article too, but I keep getting the same message. I already sent a report, ID is 441458891. What do I do? Please help, I am so lost on this one.