I'm having the exact same problem on my machine. I believe the problem is that the file "rootfs.tar.bz2" is zero bytes in length. It looks like the rootfs didn't get zipped properly.
Hello,
Use "mfgtools-with-rootfs-mx8.zip" instead of "mfgtools-without-rootfs-mx8.zip".
Have a great day,
Yuri
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