Hello Rumen,
(I followed the steps I outlined in my first e-mail with a fresh file-system on a test-machine using my debian-13.3.0 and vbox6 pkg, where I could install Debian via the graphical installer successfully. That was to make sure, that the pkgs work as intended.)
Obtaining the ISO file got me to the installer. However, immediately after I click install, vbox goes black and the logs say that the VM was stopped.
Any ideas what could be causing the crash? I tried disabling 3D acceleration and expanding my storage but to no avail.
Can you recall, what exactly the log message did denote?
Best regards, Josef