How to Serve Laravel Application in handle or handle_path directives

You’ll need to configure your routes (in web.php probably) to be aware of /alias-laravel-app as a base. You can wrap all your routes like this:

Route::prefix('alias-laravel-app')->group(function () {
    // Your routes here
});

See this article:

Ultimately the key is that your upstream app needs to be aware of being run within a subpath.