Splunk TA for *nix installation

I installed Splunk TA for *nix and I'm on the "Splunk for Unix Technology Add-on: Setup" page. I completed my selections and hit Save, then OK, but it brings me back to the same input selection page.

How do you get the app to execute?

I tried restarting Splunk -> Manager -> Apps -> Launch App.

I'm running Splunk on a Red Hat server.

Thanks