Reinstall the official Android USB drivers and try a different USB port. Wrong SKU region mismatch or active bootloader lock.
If your phone can still boot to Android: asus zenfone 5z -zs620kl raw firmware-
Elias unplugged the cable. He took a breath and pressed the power button. Reinstall the official Android USB drivers and try
ASUS does publish raw *.raw files directly. They publish: asus zenfone 5z -zs620kl raw firmware-