/usr/lib/x86_64-linux-gnu/libCharLS.so is in libcharls-dev 1.0-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libCharLS.so.1
/usr/lib/x86_64-linux-gnu/libCharLS.so.1