Fatal error: Class 'Symfony\Component\Debug\ExceptionHandler' not found in path/to/symfony\http-kernel\Symfony\Component\HttpKernel\Debug\ExceptionHandler.php

[senguttuvang]

I followed the procedure to install the demo app, the home page renders, but when I click the authorize button, it redirects and show this error message. The following is the stack trace from my wamp server (Windows 7 64-bit)

Note sure this is because of recent change in Symfony, but I have no clue as the class reported to be missing actually exists. Am I missing anything obvious?

( ! ) Fatal error: Class 'Symfony\Component\Debug\ExceptionHandler' not found in C:\wamp\www\oauth2\oauth2-server-demo\vendor\symfony\http-kernel\Symfony\Component\HttpKernel\Debug\ExceptionHandler.php on line 24 Call Stack Time Memory Function Location 1 0.0014 714544 {main}( ) ..\index.php:0 2 0.0535 3926032 Silex\Application->run( ) ..\index.php:69 3 0.0535 3926032 Silex\Application->handle( ) ..\Application.php:481 4 0.0656 4388088 Symfony\Component\HttpKernel\HttpKernel->handle( ) ..\Application.php:504 5 2.3428 5418680 Symfony\Component\HttpKernel\HttpKernel->handleException( ) ..\HttpKernel.php:79 6 2.3442 5437744 Symfony\Component\EventDispatcher\EventDispatcher->dispatch( ) ..\HttpKernel.php:188 7 2.3443 5438128 Symfony\Component\EventDispatcher\EventDispatcher->doDispatch( ) ..\EventDispatcher.php:53 8 2.3443 5438464 call_user_func ( ) ..\EventDispatcher.php:164 9 2.3443 5438496 Silex\ExceptionHandler->onSilexError( ) ..\EventDispatcher.php:164 10 2.3443 5438976 Composer\Autoload\ClassLoader->loadClass( ) ..\EventDispatcher.php:0 11 2.3458 5442784 include( 'C:\wamp\www\oauth2\oauth2-server-demo\vendor\symfony\http-kernel\Symfony\Component\HttpKernel\Debug\ExceptionHandler.php' ) ..\ClassLoader.php:183