The error looks like below. Query returns entities without triage record at all.

'NoneType' object is not iterable
Traceback (most recent call last):
  File "/base/data/home/apps/s~findit-for-me/waterfall-frontend:05614928c.401142640151602819/gae_libs/handlers/base_handler.py", line 185, in _Handle
    result = handler_func() or {}
  File "/base/data/home/apps/s~findit-for-me/waterfall-frontend:05614928c.401142640151602819/handlers/obscure_emails.py", line 115, in HandleGet
    failure_triage_count = _ObscureTriageRecordsInWfAnalysis()
  File "/base/data/home/apps/s~findit-for-me/waterfall-frontend:05614928c.401142640151602819/handlers/obscure_emails.py", line 40, in _ObscureTriageRecordsInWfAnalysis
    for triage_record in entity.triage_history:
TypeError: 'NoneType' object is not iterable