I need HELP!

Good morning,
I am a not very experienced Linux User at all, so the following problem might be easy to solve. I use Ubuntu 14.04 and downloaded the correct version of VirtualBox. I also downloaded WhoNix Workstation and Gateway. As soon as I have imported the appliances (I did not change any settings) and started the Gateway it just says:

error: file not found.
Entering rescue mode…
grub rescue>

What can I do?

downloaded the correct version of VirtualBox

Sounds wrong. Uninstall it and install it using your distribution’s package manager.

sudo apt-get update sudo apt-get install virtualbox linux-headers-$(uname -r)