Make it so that you can select instance with select action if its empty

openpype/hosts/maya/plugins/publish/validate_model_content.py

@@ -31,7 +31,7 @@ class ValidateModelContent(pyblish.api.InstancePlugin):
         content_instance = instance.data.get("setMembers", None)
         if not content_instance:
             cls.log.error("Instance has no nodes!")
-            return True
+            return [instance.data["name"]]
 
         # All children will be included in the extracted export so we also
         # validate *all* descendents of the set members and we skip any