Symfony vendor autoload_runtime

When I try to do : symfony console d:d:c

to initiate my database I have :

Parse error: syntax error, unexpected '?' in C:\Users\user\my_project_name\vendor\autoload_runtime.php on line 21 exit status 255

Here is the autoload_runtime file :

// autoload_runtime.php @generated by Symfony Runtime

if (true === (require_once __DIR__.'/autoload.php') || empty($_SERVER['SCRIPT_FILENAME'])) {
    return;
}

if (PHP_VERSION_ID < 80000 && in_array(PHP_SAPI, ['cli', 'phpdbg'], true)) {
    ob_start();
    $app = require $_SERVER['SCRIPT_FILENAME'];
    ob_end_clean();
} else {
    $app = require $_SERVER['SCRIPT_FILENAME'];
}

if (!is_object($app)) {
    throw new TypeError(sprintf('Invalid return value: callable object expected, "%s" returned from "%s".', get_debug_type($app), $_SERVER['SCRIPT_FILENAME']));
}

$runtime = $_SERVER['APP_RUNTIME'] ?? 'Symfony\\Component\\Runtime\\SymfonyRuntime';
$runtime = new $runtime(($_SERVER['APP_RUNTIME_OPTIONS'] ?? []) + [
  'project_dir' => dirname(__DIR__, 1),
]);

[$app, $args] = $runtime
    ->getResolver($app)
    ->resolve();

$app = $app(...$args);

exit(
    $runtime
        ->getRunner($app)
        ->run()
);

I don't know where the problem is, can someone help please ?

NB : I put a .php-version in my symfony project with my current version inside and it works.

Question done !

Your PHP doesn't understand the "null coalesce operator" ??, that was introduced in PHP 7, that means you're using a PHP 5.x version.

The current version of Symfony (5.3) requires PHP 7.2.5 or higher. (but php7.2 is already end of life, you should upgrade to PHP 7.4 or 8.0)