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Answering my own questions this worked for me

sudo su
csrutil clear
reboot

Then uninstall (from the official uninstaller) and re-install virtualbox. If needed go to System Preferences - Privacy - General and accept the extensions. Reboot again.

as suggested in https://forums.virtualbox.org/viewtopic.php?f=39&t=98763&sid=7541dfcace7a86fdb5bc8a281296ad94&start=75#p488555

This worked for me

sudo su
csrutil clear
reboot

• Then uninstall (from the official uninstaller) and re-install VirtualBox
• If prompted, go to System Preferences - Privacy - General and accept the extensions
• Reboot

Answering my own questions this worked for me

sudo su
csrutil clear
reboot

as suggested in https://forums.virtualbox.org/viewtopic.php?f=39&t=98763&sid=7541dfcace7a86fdb5bc8a281296ad94&start=75#p488555

Answering my own questions this worked for me

sudo su
csrutil clear
reboot

Then uninstall (from the official uninstaller) and re-install virtualbox. If needed go to System Preferences - Privacy - General and accept the extensions. Reboot again.

as suggested in https://forums.virtualbox.org/viewtopic.php?f=39&t=98763&sid=7541dfcace7a86fdb5bc8a281296ad94&start=75#p488555

Answering my own questions this worked for me

csrutil clear
reboot

as suggested in https://forums.virtualbox.org/viewtopic.php?f=39&t=98763&sid=7541dfcace7a86fdb5bc8a281296ad94&start=75#p488555

Answering my own questions this worked for me

sudo su
csrutil clear
reboot

as suggested in https://forums.virtualbox.org/viewtopic.php?f=39&t=98763&sid=7541dfcace7a86fdb5bc8a281296ad94&start=75#p488555