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

I had the same problem after I got a new computer. Instead of of copying all files from my old computer, I had to check out the vagrant projects again from the git repository. After that, vagrant up worked fine.