Grafana webhook

I have configured grafana webhook and incidents are creating on iris but iris not able to send email/slack alerts for these incidents, below are error from sender.

2019-05-08 07:05:36,483 INFO iris.sender.cache refreshed target reprioritization rules: 0
2019-05-08 07:05:36,724 INFO iris.sender.quota Refreshing app quotas
2019-05-08 07:05:36,730 INFO iris.sender.quota Refreshed app quotas:
2019-05-08 07:06:35,002 INFO root --> sender looop started.
2019-05-08 07:06:35,002 INFO iris.sender.cache refreshing plans
2019-05-08 07:06:35,010 INFO iris.sender.cache refreshing templates
2019-05-08 07:06:35,022 INFO root [-] start escalate task...
2019-05-08 07:06:35,026 INFO root [*] 1 new incidents
2019-05-08 07:06:35,036 ERROR root Exception occured in main loop.
Traceback (most recent call last):
File "/iris/src/iris/bin/sender.py", line 1590, in main
escalate()
File "/iris/src/iris/bin/sender.py", line 508, in escalate
if create_messages(incident_id, plan_notification_id):
File "/iris/src/iris/bin/sender.py", line 287, in create_messages
dynamic_info = cache.dynamic_plan_map[incident_id][plan_notification['dynamic_index']]
KeyError: 2

Start in iris/bin/sender.py at create_messages(), where the traceback shows a KeyError for dynamic_plan_map and dynamic_index. Reproduce the failure with a Grafana webhook-created incident and trace how its plan notification is built. Done means the incident can send its configured email or Slack alerts without the sender main loop failing.