/usr/lib/libkworkspace.so.4abi2 is in libkworkspace4abi2 4:4.11.8-0ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libkworkspace.so.4.13.0.abi2
/usr/lib/libkworkspace.so.4.13.0.abi2