Hello! Yesterday I got my 13v2 with a 250GB SSD, have installed Qubes os 3.2 on it but I have the same problem. I tried many times to fix it with all your precious informations:
It seems to work correctly in the troobleshooting, but here is the result when I reboot:
Booting from Hard Disk...
.
error: no such device: 626f3abe-d6eb-423a-a751-b4ffbc450e08
Entering rescue mode...
grub rescue>
Here (with lsblk) we can see that the installation target is sda and not sdb:
Now I’m discouraged cause I really need to learn more about Qubes.
Are you willing to give me some ideas to solve the problem?