Fatal error: Uncaught Error: Interface "Concrete\Core\Install\PreconditionInterface" not found in /home/vincent/http/concrete5/concrete/src/Install/Preconditions/PhpCommentsPreserved.php:9 Stack trace: #0 {main} thrown in /home/vincent/http/concrete5/concrete/src/Install/Preconditions/PhpCommentsPreserved.php on line 9