If you are on this page and are enrolled in Mike Walfish's spring 2020 cs202, then you are on the wrong page, and you got to this page owing to a link error in NYU Classes. Please go here instead, and update your bookmarks. If you already started working on the labs, then you will unfortunately need to start over. We can help you port over your work in office hours: you'll need a new Vagrant file, and a new clone of the lab repo. But probably best just to start over.