I just upgraded from version 1.2.1 to 1.3.1 and I'm getting this error on all of the searches in the main "Cisco IOS Overview" dashboard.
Error in 'PivotProcessor': Unable to fetch datamodelreport REST endpoint '/servicesNS/admin/cisco_ios/datamodel/pivot/Cisco_IOS_Event' from 'https://127.0.0.1:8089'
My splunk install is pretty vanilla.
This is a Splunk defect. It's been reported to Splunk and is currently being investigated. Defect ID: SPL-83310
There is more information about the issue in another thread: http://answers.splunk.com/answers/131980/cisco-ios-default-dashboard-not-working
In the meantime try upgrading to Splunk 6.1 and see if that fixes it for you.
Regards,
Mikael
Author of the Cisco IOS app