I just tried to install the epub reader foliate from the software repositories. When I select it, the only other thing that gets checked is a language package, and no other dependencies are called out to be loaded. When I try to execute the program I get no errors, but…all I get is a window entitled “Loading…” and a rotating gear. After a minute of this, I concluded nothing was going to happen, so I closed the window, uninstalled the software and re-installed. The same thing happened, both from the keyboard and from the Applications menu.