Fatal error: Uncaught Error: Class "OC\IntegrityCheck\Exceptions\InvalidSignatureException" not found in /users/ms-it/www/oc/lib/private/IntegrityCheck/Exceptions/MissingSignatureException.php:29 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/lib/private/IntegrityCheck/Exceptions/MissingSignatureException.php on line 29