virtualbox.org

I am running Ubuntu 20.04 on my host. I have VirtualBox 6.1.10 installed.

When I try to create a new host network interface I get:

Failed to create a host network interface.

VBoxNetAdpCtl: Error while adding new interface: failed to open /dev/vboxnetctl: No such file or directory.

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: HostNetworkInterfaceWrap
Interface: IHostNetworkInterface {455f8c45-44a0-a470-ba20-27890b96dba9}

I have done this dozens of time on Ubuntu 18.04 and Linux Mint 19. Same process, but now it does not work. I am looking for any help on this.

Thank you in advance.

I think I'm seeing the same issue. I'm on Ubuntu Server 18.04 LTS, recently did an and vboxweb-service stopped listening on port 18083.

How are you attempting to manually create a host network interface?

I've manually downgraded from 6.1.10 and managed to get it working again on 6.1.4 - not sure what the problem was. I tried all versions in between and none worked.

Not sure how to debug further as I'm a bit of a beginner!

I open the Oracle VirtualBox GUI application.
Click the right button next to tools and select "Network".
Click the "Create" Icon and then I get the error.

I first installed 6.1.6 from the Ubuntu Apt package manager and had the same errors.

I then downloaded 6.1.10 from the website to see if it was better, and got the same errors again.

I will try 6.1.4 as stated above and see if that works.

Ok, 6.1.4 worked, but it did something the others did not. It detected UEFI and required me to set a password to confirm MOK setup after reboot. I did that and it worked.

Then I installed 6.1.10 and it now works too.