/usr/lib/x86_64-linux-gnu/gnucash/libgnc-business-ledger.so.0 is in gnucash 1:2.6.4-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/gnucash/libgnc-business-ledger.so.0.0.0
/usr/lib/x86_64-linux-gnu/gnucash/libgnc-business-ledger.so.0.0.0