Can't access files under vendor/* on Ubuntu 18.04

I'm not sure if this is a htaccess issue or something else, but after installing FiercePhish on a couple of Ubuntu 18.04.6 boxes (both Digital Ocean and AWS) the app is essentially broken as everything under vendor/ returns a 404.  That's where all the css and js seems to live, so it cripples the app.

Reinstalled on Ubuntu 20.04 and those files are available and the app works as expected.  