Cisco Security Suite & Splunk for Cisco ISE add-on is not compatible with Splunk version 7.1.x Please let us know what will be the estimate time for releasing of compatible versions of these apps.
The app shows compatibility all the way up to the latest version of Splunk (7.3) for Cisco Security Suite and 7.2 for Cisco ISE add-on. I currently have Cisco Security Suite installed on Splunk Cloud.