Under the Details it was complaining about VirtualBox.xml

Looking in Windows Explorer in the .VirtualBox folder

C:\Users\Username\.VirtualBox

it shows that the VirtualBox.xml file being empty. Delete the file. Reinstall VirtualBox. Now go to your VM’s in

C:\Users\Username\VirtualBox VMs

Open up the VM folder and double click on the “Virtual Machine Definition” file to “reimport” them into VirtualBox.