Slack Notification Alert Add-on: Error code

[devsupport]

Hi,
We are attempting to use the Slack Notification Alert Add-on and seeing errors. We created a test alert and then use the following search to send an alert.

| sendalert slack param.channel="#my-channel" param.message="Testing"

In the logs, we see error code=6 and class 'urllib2.URLError' .
Any idea what the problem could be? We are running Splunk Enterprise version 7.2.4.2.

06-25-2019 08:35:21.561 -0700 WARN  sendmodalert - action=slack - Alert action script returned error code=6
06-25-2019 08:35:21.561 -0700 INFO  sendmodalert - action=slack - Alert action script completed in duration=393 ms with exit code=6
06-25-2019 08:35:21.432 -0700 FATAL sendmodalert - action=slack STDERR -  Alert action failed
06-25-2019 08:35:21.432 -0700 FATAL sendmodalert - action=slack STDERR -  Unexpected error: 

[hettervik]

Did you ever find a solution to this? Seems that we are facing the same issue. 

[rashi83]

@devsupport - I am also facing same issue , did you find any resolution?