How to run a downloaded laravel project from github?

So I made laravel project and I want to share it to my friends. I uploaded it to GitHub and I let them download it. After downloading the project, they tried to run it but they got this error instead

Fatal error: Uncaught BadMethodCallException: Method Illuminate\Foundation\Application::handleRequest does not exist.

They already tried doing "composer update" and they already configured the .env file.