: This specific exit status code is often vendor-specific and can vary in meaning depending on the device or system that's reporting the error. However, the occurrence of such an error usually signifies a critical failure in the firmware validation process.
If the device's date/time is incorrect or it is running very old firmware (pre-3.7.56), it may not support HTTPS. Try changing the https:// link to http:// for the download.
If the bootloader environment is corrupted: