No vendor folder

[threed-factory-store]

public/index.php has this line:
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';

dirname('public') takes us to demo-main which has no vendor folder.

What aren't you telling us?

[endelwar]

You must run composer install to download vendors and autogenerate /vendor/autoload_runtime.php

[bocharsky-bw]

Hey @threed-factory-store,

Please, follow the installation guide in the README to install it in a simple way: https://github.com/symfony/demo#installation

If you install this project in another (more advanced) way - we already suppose you know the basics of Composer

[javiereguiluz]

Victor is right. We provide two different commands to install the project (via Symfony CLI and via Composer). Both commands create the vendor/ directory and download everything that is needed. If users prefer other installation methods, we can't provide the instructions for it. Thanks for understanding!