I got my initial issues sorted out (I have to use tv go channels). It worked okay for a few days but now it doesn't work at all. Similar to the post above, when hit the cast icon the Chromecast loads up the ignite tv app no problem on the tv. "ready ...
I have the same problem. Away from home wireless I get the TVAPP-00101 error using the ignite tv app from my android phone on a Samsung smart tv and Chromecast Gen 3.However, on an older Samsung dumb tv with a 2nd gen Chromecast everything plays fine...