The problem can be solved with an :
sudo dpkg-reconfigure cover-thumbnailer
or
gconf-schemas --register cover-thumbnailer.schemas
NOTE : It is for Debian based distributions only ↑
The problem can be solved with an :
sudo dpkg-reconfigure cover-thumbnailer
or
gconf-schemas --register cover-thumbnail er.schemas
NOTE : It is for Debian based distributions only ↑