VirtualBox Ubuntu install problem

I have attempted to installed a virtual Ubuntu Server on my macOS (BigSur) with VirtualBox. 

I loaded VirtualBox via terminal (sudo virtual box).
when I attempt to start the VM and install the ubuntu OS
I couldn't access my filesystem:


Failed to open a session for the virtual machine
details: 
The VM session was aborted

Result Code: 
NS_ERROR_FAILURE (0x80004005)