Fatal error: Uncaught Error: Class 'PharIo\Version\AbstractVersionConstraint' not found in D:\svn\blog\vendor\phar-io\version\src\constraints\AndVersionConstraintGroup.php:13 Stack trace: #0 {main} thrown in D:\svn\blog\vendor\phar-io\version\src\constraints\AndVersionConstraintGroup.php on line 13