Splunk 7.2.0 is not compatible with the Add-On, please check the Add-On page below for more details:
https://splunkbase.splunk.com/app/1915/#/overview
COMPATIBILITY
Products: Splunk Cloud, Splunk Enterprise
Splunk Versions: 7.1, 7.0, 6.6
Platform: Platform Independent
CIM Versions: 4.11
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