I am also encountering this on Mint 16.04.1. Is there a way to disable charts? I doubt I generate enough data to make a chart useful. Otherwise there is a mirror on
neon.kde.org that has what appears to be an entire set of libqt5 binary packages precompiled for xenial but I was having a little trouble getting it to sync with apt. It should really be done with a package manager because of all the dependencies.
Thanks