Fatal error: Uncaught Error: Interface "Psy\Completion\Source\SourceInterface" not found in /opt/lampp/htdocs/appproject/vendor/psy/psysh/src/Completion/Source/StaticPropertySource.php:23 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/appproject/vendor/psy/psysh/src/Completion/Source/StaticPropertySource.php on line 23