Fatal error: Uncaught Error: Class 'PharIo\Version\AbstractVersionConstraint' not found in C:\xampp73\htdocs\web\vendor\phar-io\version\src\constraints\ExactVersionConstraint.php:12 Stack trace: #0 {main} thrown in C:\xampp73\htdocs\web\vendor\phar-io\version\src\constraints\ExactVersionConstraint.php on line 12