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

I ran into the same problem today.
I edited my UID by opening the file .vagrant/machines/default/virtualbox/creator_uid and changing the 501 to a 0.

After I saved the file, the command vagrant up worked like a champ.

NB: the .vagrant folder is in the same directory as your Vagrantfile, where you ran vagrant up