Fix module registration

apps/encryption_dummy/appinfo/app.php

@@ -2,5 +2,7 @@
 
 $manager = \OC::$server->getEncryptionManager();
 $module = new \OCA\Encryption_Dummy\DummyModule();
-$manager->registerEncryptionModule('OC_DUMMY_MODULE', 'Dummy Encryption Module', $module);
+$manager->registerEncryptionModule('OC_DUMMY_MODULE', 'Dummy Encryption Module', function() use ($module) {
+	return $module;
+});