The Splunk Add-on for Cisco ESA is not intended to be visible in Splunk Web, so there is no UI to show. When a non-visible add-on is accidentally set to be visible, you'll see the kind of behavior you've described.
To turn off visibility:
1. Go to Apps > Manage Apps.
2. Find the row for the add-on you are working with and click Edit properties.
3. Under Visible, choose No, then click Save.
(Reference: http://docs.splunk.com/Documentation/AddOns/released/Overview/Troubleshootadd-ons#Check_if_the_add-on_is_intended_to_be_visible_or_not)
If you are looking for instructions on how to configure this TA, start here: http://docs.splunk.com/Documentation/AddOns/released/CiscoESA/Installationsteps
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