Ensure your host PC has Sunshine or NVIDIA GameStream enabled.
Download the Moonlight.nro file and place it in the sdcard:/switch/Moonlight-Switch directory. Under the Moonlight v1.0 [Completed]
Set your host resolution to match your target client device (e.g., for Steam Deck or for Switch) to avoid scaling issues . Ensure your host PC has Sunshine or NVIDIA
Often happens on legacy devices like Steam Link; double-check that your resolution matches exactly on both ends. Under the Moonlight v1.0 [Completed]
Usually caused by an outdated version or a firewall blocking the connection. Ensure both host and client are on the latest "completed" stable release.