If you want to work locally before putting your site online follow these steps
1 Download repo
To start, download the repo
Create your database, modify the necessary information in the .env file.
Import the installation.sql into your database.
Open a command prompt and type the command composer install
Wait and when it's finished, go to your project url and work with this!
Follow => https://symfony.com/doc/current/deployment.html#b-configure-your-environment-variables
First cli command.
composer dump-env prod and composer install --no-dev --optimize-autoloader
Now you can upload your site
4 Bugs and more
I would not provide any support in case of changing the project sources for basic systems.
If you create a new system no support will also be done.
I provide support only for installation, theme modification and how to use basic systems.