Have three Rokus, two 3s and 1 SE.
Tablo works fine on the 2 Roku 3s, but on the Roku SE, the tablo app, when selected, goes to a screen which sats TABLO for several minutes, and then reverts back to the home screen.
updating but says up to date.
both restartind, and updating the Roku.
Deleted the Tablo app and reinstalled.
Plex, and other channels work fine.
All on same network, with Tablo hard wired.