Invalid bios file error in Asus easy flash

I can’t flash the modified bios (with nvme drivers) on my Asus n751jx using easy flash.
Have I missed a step? Maybe in the bios modification process. Is there any fix to the problem? If not how can I flash the bios differently.
Here is the original and modified bios and a picture of the screen.

n751jxas-nvme-mod.zip (2.3 MB)

N751JXAS211.zip (2.29 MB)

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