avoid error because of deleted data

knowledge/survey/response.py

@@ -64,6 +64,8 @@ class Responses(BaseRecordManager):
                 id += '.' + institutionId
             if referrerId:
                 id += '.' + referrerId
+            if self.storage is None:    # may happen after deletions
+                return {}
             tracks = self.storage.getUserTracks(self.uid, 0, id)
             if not tracks:  # then try without institution
                 tracks = self.storage.getUserTracks(self.uid, 0, personId)

organize/tracking/base.py

@@ -51,6 +51,8 @@ class BaseRecordManager(object):
 
     @Lazy
     def storage(self):
+        if self.context is None:
+            return None
         records = self.loopsRoot.getRecordManager()
         if records is not None:
             return records.get(self.storageName)