3.13.0-86.131) is not available, but a newer one is (3.13.0-166.216). We redirected you there.
/usr/lib/libtntdb.so.4 is in libtntdb4v5 1.3-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libtntdb.so.4.0.0