Vagrant Not Starting Up. User that created VM doesn't match current user

Question

I was trying to start up my vagrant machine, so I navigated to the folder where my vagrantfile is, and used:

vagrant up && vagrant ssh

but I got the

Answer 1

According to the VirtualBox User Manual:

As a security measure, the Linux implementation of internal networking only allows VMs running under the same user ID to establish an internal network.

In other words, you have to switch to root (UID 0) to run it.