Problem install on AC1900 R6800 (netgear)

Hello all,

I have a problem when I install openwrt (openwrt-22.03.5-ramips-mt7621-netgear_r6800-squashfs-factory.img) on my netgear (AC1900 R6800).

For more information, I have made log across a serial port link.

  1. boot -->
  2. install R6800_V1.2.0.92_1.0.1.img -->
  3. install openwrt-22.03.5-ramips-mt7621-netgear_r6800-squashfs-factory.img -->

Someone can help me to understand what have I do wrong, please ?