Update: I did a system restart on the TV and a while later the TV was visible to Roku Connect.
I was told to repost this to the developers forum:
I used HPM and installed the Roku Connect app. When I click the "Discover New Devices" button it does not find any. I turned on my one Roku TV and confirmed it is on the network. Any ideas why the app is not discovering my TV?
This is all the log says:
UPDATE: I fond this regarding control by mobile apps, enabled mine (Instead of limited), and still the TV was not detected.