If you’ve deleted a virtual machine file still referenced by one of your projects, you’ll run into the following error when you try and instantiate the VM via
Your VM has become “inaccessible.” Unfortunately, this is a critical error with VirtualBox that Vagrant can not cleanly recover from. Please open VirtualBox and clear out your inaccessible virtual machines or find a way to fix them.
Vagrant creates a hidden folder within your project directory named .vagrant with files that refer to specific VM IDs.
Simply delete the .vagrant folder within your project and rerun
vagrant up. Vagrant will rebuild the .vagrant directory with the correct files and ID.