vlc starts ok on an installed Eoan system, where /lib/x86_64-linux-gnu/libvlccore.so.9 also exists, so it is not the presence of this that is on its own causing the isse on the live cd.
vlc starts ok on an installed Eoan system, where /lib/x86_ 64-linux- gnu/libvlccore. so.9 also exists, so it is not the presence of this that is on its own causing the isse on the live cd.