Dev environment issues

[Velua]

Just trying to get this repo running and got this error.

npm ERR! 404 Not Found - GET https://registry.npmjs.org/@fortawesome%2ffontawesome-pro - Not found
npm ERR! 404 
npm ERR! 404  '@fortawesome/fontawesome-pro@^5.10.1' is not in the npm registry.
npm ERR! 404 You should bug the author to publish it (or use the name yourself!)

Looking at npmjs it appears this package is no longer at this name, not sure where it's moved to or if this is private?

Also it looks like there's two .lock files, package-lock.json and yarn.lock I believe having both can cause conflicts and best practice to have one or the other unless I'm mistaken.