I just stumbled upon this problem myself. I think you have found this section since 2015?
Well, this solution is a bit outdated, but still appropriate: in 64-bit Ubuntu 16.04 there really is no 32-bit version of libraries and
lib32z1 lib32ncurses5 lib32bz2-1.0 lib32stdc ++ 6 libraries recommended for installation seem to have been removed from the official repositories.
However, you can still get them with this command:
sudo apt-get install libz1:i386 libncurses5:i386 libbz2-1.0:i386 libstdc++6:i386
Then the installer should work fine. Hope this helps.
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