I might be late in replying, but another thing to try rather than resetting is clearing app cache. Go to Settings -> Apps -> Pik TV (Under System apps) -> Force Stop and Clear Cache.Then try restarting the box and opening Pik TV app.
I have a Google Home and Pik TV box. I will double check later but last time I checked, I could play Youtube Videos on Pik TV via Google Home. Netflix did not work but that was Netflix's Android TV app incompatibility and not something to do with Pik...
