access to the public folder in laravel

I bought a Laravel script and now I want to edit it. When I put a file like a jquery, I give a 404 error in the laravel public folder. But the files that were already in the public folder of laravel are running without problems, but when I create a file there, I encounter the error.

my laravel project cannot access to public folder in url like : http://basagan.com/js/jquery.js

but default file like : http://basagan.com/js/app.js is fine , work and run without problem