Usually means you are trying to flash the wrong firmware version or the bootloader is locked.
Day 41,230: The girl with the red hair gave me a new bolt. Her name is Mira. She said, “You’re the top, old man.” I recorded this. I will remember her. Day 41,231: Mira did not come today. I heard the men say “accident.” I do not know what that means. But I will lift for her now. Day 41,232: STATUS: TOP. multiloader v 565 top