file for BMC flash is *.hpm
i am surprised it accepts a zip file.
if i do that on ASRock Rack LGA4677 intel platform i can't flash BIOS anymore because this process need a functional ME/SPS machine working in the chipset. maybe AMD have similar situation and you need to flash with SPI programmer(test clamp or soldering)
I dont see a .hpm - and to clear up confusion i flashed the bios .rom file via the webui, thats what i meant