/usr/lib/x86_64-linux-gnu/libjags.so.4 is in jags 4.3.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libjags.so.4.0.3
/usr/lib/x86_64-linux-gnu/libjags.so.4.0.3