I tried standalone mode. but after that The device is not available through Ethernet connection. I tried to flash with USB many times using device manager and its still not available through Ethernet. Could you please let me know how can I run it normally with Ethernet.
Thanks!

    I even tried with ETH, Could you please send a screen shoot for the better understanding of device_manager.py .

      Hi SamiUddin
      Boot with USB (hold rst button and plug in the usbC) --> Device_manager.py --> select your device --> danger zone --> Factory reset --> NETWORK bootloader (instead of auto).

      Thanks,
      Jaka

      Still same error. Even green light of POE is blinking:

      OK I will check and Back to you soon.