Tablo not working in Safari

MacBook Pro laptop with all the updates. In Safari, Tablo loads, shows all my recordings, shows the live TV lineup, but when I click on anything, I get a place-holder screen and it never plays. Any ideas?

Mine was like that after I upgraded it last night. I ended up deleting the website data from Safari (Preferences->Privacy->Manage Website Data) and things started to work again.

I tried this, but it did not fix my problem.