unpacking errors during installation (4.0rc3)

[lucaszanella]

I already posted it on qubes forum but it got no attention. I wouldn't post it here if I didn't suspect it to be a real issue. The problem is that I tried with 2 different media, and in the 2, I verified the sha256sum of them using dd, so it's not a writing error. I also used 'test media and install' in both cases. Here it goes:

First of all, I tried installing 3.2, but graphical installation won't launch, and text installation has a bug which prevents me from installing. Also, UEFI still has all that old bugs, so I had to install with legacy mode. In 4.0rc3 graphical installation launches. I verified the pen drive checksum with dd before booting, and also launched 'test and install'. At some time on the installation, I got

https://photos.google.com/share/AF1QipMXz9KLUxsmw3OPK4ufYmw3xeyj7frOSwu3RV_zMKDtSxPeQtxYeg0g27OyCggVSw/photo/AF1QipPGKbVHkH4erY53Nkq63b0ahMoZ_Vcj-GDPjVkt?key=N0V3YloyRlZIa1BkbDVQcEd6WWJZVTY2bjlES093

after that, I did everything again with another pen drive, and got this error:

https://photos.google.com/share/AF1QipMXz9KLUxsmw3OPK4ufYmw3xeyj7frOSwu3RV_zMKDtSxPeQtxYeg0g27OyCggVSw/photo/AF1QipMOgKd9Us6k5MnZyq9KmjIEExHQwG90PHBfklmK?key=N0V3YloyRlZIa1BkbDVQcEd6WWJZVTY2bjlES093

what is happening?

*i'm on a Razer Blade Stealth 2016 4k touch 16gb ram 512gb ssd, I was installing into another pen drive (usb 3.0, original kingston) of 64gb.