I tried the suggested steps, however I still get "FATAL: No bootable medium found!" when starting vbox6. I used the persistent storage and saved the debian archive to "/ahci-1/recall/debian-13.3.0". I configured the vbox6 instance to use "/ahci-1/recall/debian-13.3.0/vm" and I checked that machine.vbox6 and machine.vdi exist in that directory. The logs are identical to the ones from my previous email.
Reading through the thread that you linked, I could not find any iso file in my "/ahci-1/recall/debian-13.3.0/vm". Could this perhaps be the issue?
Interesting. Indeed, you need an 'installer.iso' that should have been download by the Debian pkg (there is a window logging the 'fetchurl' progress when deploying it). I gave it a test and here it works as expected, so I am at a loss why it does not work on your end.
Well, in any case, you are free to obtain an .iso file by other means, for example by using the falkon browser on Sculpt OS directly or by downloading it on a different machine and copy it is into the 'vm' directory. As long as the filename is 'installer.iso' (as is configured in the 'machine.vbox6' file) it should be picked up.
Best regards, Josef