soulution that worked for me is: sudo mv /etc/xdg/sni-qt.conf /etc/xdg/sni-qt.conf.backup sudo apt -f install and update of package sni-qt worked
soulution that worked for me is: sni-qt. conf /etc/xdg/ sni-qt. conf.backup
sudo mv /etc/xdg/
sudo apt -f install
and update of package sni-qt worked