Fatal error: Uncaught Error: Class "Whoops\Handler\Handler" not found in C:\svn\conexerp\vendor\filp\whoops\src\Whoops\Handler\PlainTextHandler.php:20 Stack trace: #0 {main} thrown in C:\svn\conexerp\vendor\filp\whoops\src\Whoops\Handler\PlainTextHandler.php on line 20