2005 Hyundai Tucson P0560 Code: How to Fix System Voltage Malfunction

I own a 2005 Hyundai Tucson. The last time I drove it was Thursday, and it ran fine with no engine warning lights on. However, when I tried to start it on Monday, it would only turn over but not start. Today, my friend connected an OBD2 scanner and found the code P0560 — System Voltage Malfunction. Does anyone have experience troubleshooting or fixing this specific code in a 2005 Hyundai Tucson? Any advice on how to resolve this issue?