Can't Show a Video or Image Using Cast Feature of the Android TV
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An error There was a problem connecting to XBR-xxXxxxD (Model displayed will depend on the model of the TV) appears, and the connection fails when trying to use the Google Cast™ feature. Google has released a fix for the Google Cast Receiver app to address this issue. Make sure that the TV is connected to the internet to receive updates for the Android TV™ apps.
If the issue still occurs, perform the forced factory reset. The number of the buttons on the back of your TV determines which reset steps you need to follow.
On the back of the TV: