/usr/lib/libreoffice/share/template/el/wizard/report/stl-08.ott is in libreoffice-l10n-el 1:3.5.7-0ubuntu13.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libreoffice/share/template/el/wizard/report/../../../en-US/wizard/report/stl-08.ott