[ERROR] This command needs the pcntl extension to run.

You can either install it or use the "server:run" command instead to run the
built-in web server.

Do you want to execute server:run immediately? [Yn]  [1]:
> y

[OK] Server running on http://127.0.0.1:8000

 // Quit the server with CONTROL-C.

Fatal error: Call to undefined method Symfony\Component\Console\Style\SymfonySty
le::isDebug() in A:\!!Web\test\vendor\symfony\symfony\src\Symfony\Compone
nt\Console\Helper\ProcessHelper.php on line 59
[2015-11-21 18:09:59] php.CRITICAL: Fatal Error: Call to undefined method Symfon
y\Component\Console\Style\SymfonyStyle::isDebug() {"type":1,"file":"A:\\!!Web\\test\\vendor\\symfony\\symfony\\src\\Symfony\\Component\\Console\\Helper\
\ProcessHelper.php","line":59,"level":-1,"stack":[]}



  [Symfony\Component\Debug\Exception\UndefinedMethodException]
  Attempted to call an undefined method named "isDebug" of class "Symfony\Com
  ponent\Console\Style\SymfonyStyle".