dconf editor: cant expand any options

dconf editor: cant expand any options

I installed dconf - editor to edit the function of power button on my
laptop. When I run dconf from terminal couple lines pop in, as following:
** (dconf-editor:2223): WARNING **: dconf-schema.vala:330: Unknown
property on , extends
** (dconf-editor:2223): WARNING **: dconf-schema.vala:330: Unknown
property on , extends
** (dconf-editor:2223): WARNING **: dconf-schema.vala:401: Unknown tag
** (dconf-editor:2223): WARNING **: dconf-schema.vala:401: Unknown tag
I tried to reinstall dconf, with no effect: Dconf window opens after
running it from terminal, but I cannot expand any of the menus - so it's
completely useless for me...
I am kind of on a very first steps to ubuntu world, any help appreciated...