Running Ubuntu 18.04 in a GNOME Xorg session, I get the same error when attempting to launch 'gnome-control-center':
`ERROR:../shell/cc-panel-list.c:926:cc_panel_list_set_active_panel: assertion failed: (data != NULL) Aborted (core dumped)`
Running Ubuntu 18.04 in a GNOME Xorg session, I get the same error when attempting to launch 'gnome- control- center' :
`ERROR: ../shell/ cc-panel- list.c: 926:cc_ panel_list_ set_active_ panel: assertion failed: (data != NULL)
Aborted (core dumped)`