/usr/lib/x86_64-linux-gnu/libcinnamon-control-center.so is in libcinnamon-control-center-dev 3.6.5-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcinnamon-control-center.so.1.0.0