Can't figure out how to install the Rovo Slack App

[Steve Melzer]

From the Slack App marketplace I added the Atlassian Rovo Slack app to our workspace.  It shows up in the list of apps.  However, this is pretty much where I get stuck.

I cannot perform /rovo add (or even /rovo help) from any channel in our Slack workspace.  I can add Rovo using @rovo to a channel and it asks if I want to add Rovo, and I say yes and it says it is added.  However, it does nothing if I reference @rovo after that.

When I do /rovo add (or /rovo help or /rovo manage) I get "This app was not able to respond to your action. Please install this Slack app" but the app is installed as far as I can tell.

What am I missing?