I just bumped into this issue on Ubuntu 18.04.3 LTS
However, when I ran
sudo apt remove virtualbox-dkms virtualbox and then sudo apt install virtualbox-dkms
it guided me through the MOK process and after a reboot, Virtualbox was happily loading again.
I just bumped into this issue on Ubuntu 18.04.3 LTS
However, when I ran
sudo apt remove virtualbox-dkms virtualbox
and then
sudo apt install virtualbox-dkms
it guided me through the MOK process and after a reboot, Virtualbox was happily loading again.