Fatal error: Uncaught Error: Class "Whoops\Handler\Handler" not found in C:\svn\conexerp\vendor\filp\whoops\src\Whoops\Handler\JsonResponseHandler.php:16 Stack trace: #0 {main} thrown in C:\svn\conexerp\vendor\filp\whoops\src\Whoops\Handler\JsonResponseHandler.php on line 16