Trouble installing HA yellow. Both methods fail

Dear Community,

I am trying to install the HA that I recently bought.
I followed these instructions Getting Started – Home Assistant Yellow and got stuck at step 10. The yellow LED is still always ON which indicates that somehow HA cannot access the web. The Ethernet cable is connected to my Router and I have made sure that it has internet access.
Thus, I have followed the alternative route of using rpiboot via this tutorial How to reinstall the operating system – Home Assistant Yellow. At step 8, again I am stuck since I get the message " loading embedded bootcode.bin" multiple times.

Please let me know what to do.

Best Regards