init fix

kernel/EntityRelation.php

@@ -171,7 +171,7 @@ class EntityRelation
     {
         $moduleClass = $this->getAdditionalPropertyClassBySlug($slug);
         if ($moduleClass and method_exists($moduleClass, "saveInputs")) {
-            $moduleClass->saveInputs($entity, $model, $request, );
+            $moduleClass->saveInputs($entity, $model, $request);
         }
     }