Bootloader Update not possible

Hi

I am following these instructions to install Ubuntu: https://wiki.banana-pi.org/Getting_Started_with_BPI-W2#How_to_make_and_run_the_64-bit_ubuntu_16.04_on_SD_card_2018-4-28 At the moment I am already failing at updating the bootloader. I run Realterm on Windows for the steps and I am seeing d/g/r after a booting while pressing ctrl+q. After sending h and the bootloader file I only receive “fail! Invalid pkt” (see screenshot attached). Any ideas what I am doing wrong?

Thanks for your help! Best, rmk

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Try to use YModeom Try to use YModeom