This is the safest method to restore official software over Wi-Fi. the device. Connect it to a charger . Press and hold Volume Up + Power buttons. Select "Download latest version and recovery" .
The error is a hardware-level security feature, not a defect. However, coupled with a broken official download link , it becomes a logistical nightmare.
An official update was interrupted or contains bugs.
Try moving the console cable to the redundant SRU (if available) to see if the issue is isolated to one board. Upgrade the BootRom