/usr/share/themes/Materia-light-compact/xfwm4/shade-toggled-active.svg is in materia-gtk-theme 20180321-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/themes/Materia-light-compact/xfwm4/assets/shade-toggled-active.svg