hey buddy
im having the same issue as you my attempt you can install the desired version of helmet via interacting with the “package.json” file and after that “require it” via the “myApp.js” file EDIT
be very careful with the server.js in fact dont even touch it , i looked at mine and it seems i had some lines missing (i must of deleted some of them by accident) i made a new fork from the OG repo and filled in the missing lines and it worked