Windows 11 VM no longer starting - says no operating system installed

[webdeck2]

I've had this VM working for a long time. I ran it just fine this morning and shut it down.
When I tried to start it now, I get the error that there is no operating system installed and I get the Parallels VM BIOS screen.
I tried deselecting and re-selecting the HDD.
I checked the HDD with prl_disk_tool and it did not report any errors.
I am running 26.3.3 (57507) on macOS 26.5 on a MacBook Pro M4 Max.
I didn't change anything and now it isn't working.
How do I fix this?

 

[webdeck2]

So here's a fun update. I restored a backup of my VM from yesterday. Launched it just fine. Then I got a popup telling me to restart to update Parallels Tools. It did the update and now it's back in the same unable to boot situation. What is going on???