Another quick workaround is:
sudo ln -sf ../../../ubuntu-mono-dark/status/22/nm-device-wired-secure.svg /usr/share/icons/Ambiant-MATE/status/22/nm-device-wired-secure.svg sudo ln -sf ../../../ubuntu-mono-light/status/22/nm-device-wired-secure.svg /usr/share/icons/Radiant-MATE/status/22/nm-device-wired-secure.svg
Another quick workaround is:
sudo ln -sf ../../. ./ubuntu- mono-dark/ status/ 22/nm-device- wired-secure. svg /usr/share/ icons/Ambiant- MATE/status/ 22/nm-device- wired-secure. svg ./ubuntu- mono-light/ status/ 22/nm-device- wired-secure. svg /usr/share/ icons/Radiant- MATE/status/ 22/nm-device- wired-secure. svg
sudo ln -sf ../../.