gtk_container_add: assertion 'GTK_IS_WIDGET (widget)' failed
I am using ubuntu 20.04 version from more then a month and today I when I start to open "Settings", I got this error unexpectedly. There is no tweaking or theming done on the OS at the moment.
Steps to reproduce:
- Open GNOME Settings but it won't open
- Try running "gnome-control-center" from terminal and it throws below error
(gnome-control-center:31735): Gtk-CRITICAL **: 08:34:14.624: gtk_container_add: assertion 'GTK_IS_WIDGET (widget)' failed  31735 segmentation fault gnome-control-center