You receive the error code 2168-0002 when playing Nintendo Switch.
Complete These Steps:
Restart the console by holding down the POWER Button for three seconds, then selecting "Power Options" > "Restart".
If the console is not responding, hold down the POWER Button for twelve seconds to force it shut down. Then power on the console again.
Ensure your console has the latest system version, then use the console and see if the error code appears again.
Situation Not Resolved:
If the error persists, the Nintendo Switch console may need to be repaired, please find additional information here.