failure of starting image after downloading it from https link

[NiKiZe]

post your script,

try imgstat before boot to make sure nothing is loaded that shouldn't be and also double check filesize.
make sure you don't have any bootx64.efi loaded (it should be extracted from wim)

You might also want to use the BCD from https://github.com/NiKiZe/wimboot-bcd which simplifies (nullifies) the need for patching BCD by wimboot