Fatal error: Uncaught Error: Interface "Psy\ManualUpdater\Checker" not found in /opt/lampp/htdocs/msjmaterial/vendor/psy/psysh/src/ManualUpdater/IntervalChecker.php:19 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjmaterial/vendor/psy/psysh/src/ManualUpdater/IntervalChecker.php on line 19