Media Player Services not Functioning

I recently added my Denos HEOS receiver to my Home Assistant setup. It added fine and the default Media Control Card that is added in the Lovelace UI works 100%.

If I was listening to SirusXM on my receiver and shut it off, the Lovelace card shows the correct SirusXM channel and that the receiver is currently not playing. If I push the play button on the Lovelace card the receiver turns on, changes to the SirusXM source and plays that channel.

However, I am trying to use some of of the other Media Player Services and they do not seem to work. I am testing them via the UI using the Developer Tools > Services section.

I have tried turn_on, turn_off, play_media, and I have done heos.sign_in as well. None of them do anything.
It is perplexing as it is clear Home Assistant can communicate, but nothing works.

Here is the debug log for the turn_on command.

2021-12-02 10:55:26 DEBUG (MainThread) [homeassistant.components.websocket_api.http.connection] [139937442603456] Received {'type': 'execute_script', 'sequence': [{'service': 'media_player.turn_on', 'target': {'entity_id': 'media_player.living_room'}}], 'id': 36}
2021-12-02 10:55:26 INFO (MainThread) [homeassistant.helpers.script.websocket_api_script] websocket_api script: Running websocket_api script
2021-12-02 10:55:26 INFO (MainThread) [homeassistant.helpers.script.websocket_api_script] websocket_api script: Executing step call service
2021-12-02 10:55:26 DEBUG (MainThread) [homeassistant.core] Bus:Handling <Event call_service[L]: domain=media_player, service=turn_on, service_data=entity_id=['media_player.living_room']>
2021-12-02 10:55:26 DEBUG (MainThread) [homeassistant.components.websocket_api.http.connection] [139937442603456] Sending {"id": 36, "type": "result", "success": true, "result": {"context": {"id": "92528bd34574a6ca2110eba8ca9b0ba9", "parent_id": null, "user_id": "dd06fa5e999b4ff8aefb59f68ea51f8e"}}}

I am pretty new to HA, so I am not sure how else to troubleshoot this. Any guidance is appreciated.

Thank you.