/usr/lib/x86_64-linux-gnu/libdbusmenu-glib.so.4 is in libdbusmenu-glib4 16.04.1+18.04.20171206-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdbusmenu-glib.so.4.0.12