/usr/bin/unity-control-center:6:g_assertion_message:g_assertion_message_expr:make_palette:setup_from_config:cc_rr_labeler_constructor

The Ubuntu Error Tracker has been receiving reports about a problem regarding unity-control-center. This problem was most recently seen with package version 15.04.0+18.04.20180216-0ubuntu1+201803121415~ubuntu18.04.1, the problem page at https://errors.ubuntu.com/problem/4a48ad799e0f52f63096d837a069e515092b2592 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.