I am am admin in my Splunk instance and installed the Sankey Diagram - Custom Visualization app. I have looked through all of the documentation for instructions, but it references that the visualization should be available from the picker in the Searching and Reporting app. When I run a search, I go to the visualization tab, in the drop down I do not see the Sankey Visualization as an option.
I used the example search from the documentation to make sure I had proper search results, and still no luck.
The app shows up in my manage apps screen as Enabled, I checked the permissions to the app, everyone has read and admin have write. I don't think it is relevant, but just in case the config file-only objects are set to "This app only."