Rotel A14 and LG TV issue

I recently bought a Hotel A14 and hooked it up to my LG TV via optical tousling cable.  When I open the Pandora app on the TV, it successfully feeds the signal and I get sound to my speakers, but with the Netflix, Amazon Prime, Amazon Music and Spotify apps, the sound doesn't work.

I am stumped as to how to fix this.  Does anyone have a clue why this is happening and how to fix it?

Thank you in advance for any tips!