This page isn’t working HTTP ERROR 500

[JavesPotato]

You cannot run PHP composer here in Infinityfree.

Composer

You can just install Composer on your own computer and install the dependencies on there. Then, you can upload the entire codebase along with the generated vendor folder and use the Composer dependencies that way.

How to use composer in infinityfree.net?

Composer just spits out regular PHP code. So yes, it will just work. You only need the composer tool to download the dependencies and generate the code to load them. But once the initial composer install or composer update command is done, you don’t need composer itself anymore.