Launching a VirtualBox machine inside a VirtualBox machine with Vagrant fails

I have installed a VirtualBox Ubuntu 22.04 in a Windows 10 host which has an Intel i5 processor.

In the Ubuntu VM, I have installed the Vagrant.

My purpose is to launch a virtual machine inside the existing virtual machine.

I have Virtualbox 7.0 installed and also enabled the nested virtualization feature in the relevant setting’s field.

I have given the vagrant init with the Ubuntu official box

vagrant init hashicorp/bionic64

And have modified the created Vagrant file as follows:

Vagrant.configure("2") do |config| = "hashicorp/bionic64"
  # enable nested virtualization
  config.vm.provider :virtualbox do |v|
  v.customize ["modifyvm", :id, "--nested-hw-virt", "on"]

However when I give vagrant up I always get the following :

No usable default provider could be found for your system.

What have I done wrong with the above configuration?