virtualbox.org

Hi,
When starting guest(s) previously working, I now get "Virtual Box: Critical error while running the virtual machine" and an referral to go here

I also tried new guests, cut down on guest cpu's and memory as well as apt purge virtualbox and re-install.
Added the log of a newly created guest to this post. Any help is appreciated.
Ton

The guru meditated on "VERR_INVALID_STATE", meaning that something your guest is trying wasn't compatible with the guest setup. VT-x is working, memory & core count are good, assuming the guest OS doesn't need more. The boot process does not get to accessing anything from the guest OS, though.

You're running the Ubuntu fork of Virtualbox, not the official download from virtualbox.org:
00:00:00.577168 VirtualBox VM 6.0.14_Ubuntu r132055 linux.amd64 (Oct 17 2019 07:24:16) release log
We don't support the forks here. You might want to get the official download.

You have the OSE version and the VNC extension pack installed. Maybe these are broken?

00:00:00.577235 Package type: LINUX_64BITS_GENERIC (OSE)
00:00:00.583139 Installed Extension Packs:
00:00:00.583156 VNC (Version: 6.0.14 r132055; VRDE Module: VBoxVNC)

This is your guest type:

00:00:00.598040 Guest OS type: 'Linux26_64'

What guest OS are you trying to install or run?

Thnx so far.

What guest OS are you trying to install or run?

Same error with any VM (existing win-7 debian) The logfile is trying to start the gparted-live-1.1.0-1-amd64.iso

Got fed up with it so followed the advise

You might want to get the official download.

apt purge virtualbox*
reboot
installed the 'official' download
and i'm happy again.

Nice! Glad you're up and running!