Fatal error: Uncaught Error: Class "Psy\Exception\RuntimeException" not found in /opt/lampp/htdocs/msjavgproperties/vendor/psy/psysh/src/Exception/InvalidManualException.php:17 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjavgproperties/vendor/psy/psysh/src/Exception/InvalidManualException.php on line 17