I would not be worried about this message. I had issues to configure my email account correctly (access to Office365 via EWS) but eventually I succeeded to set it up. I created the new online account and I closed the control center. Then it worked in my Evolution client. Later the same day I tried to go to control center again to change other settings but I couldn't open it.
I cannot reproduce it again. My best guess for the scenario is: 1. Configure new EWS account in control-center panel. 2. Close the panel. 3. Try to start it again. I cannot try it again as I have just one EWS-capable account. I don't want to delete it from the settings because it would probably delete my local mailbox and I would lose all my configuration. I don't think unsuccessful email configuration has anything to do with this problem because it cannot be saved until connection to mail server is established. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1807076 Title: gnome-control-center doesn't start Status in gnome-control-center package in Ubuntu: Incomplete Bug description: gnome-control-center doesn't start. There is no crash, core dump, etc. This bit in syslog (/var/log/syslog) gives us some information: gnome-control-c[2962]: invalid unclassed pointer in cast to 'GtkWindow' gnome-control-c[2962]: gtk_window_present_with_time: assertion 'GTK_IS_WINDOW (window)' failed Actually something similar has been seen already in the past but it hasn't been resolved: https://bugs.launchpad.net/ubuntu/+source/gnome-control- center/+bug/1745846 I might not be the only person affected: https://askubuntu.com/questions/1094442/gnome-control-center- disappears-on-ubuntu-18-10-after-repostioning-ubuntu- dock/1098815#1098815 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.2 ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18 Uname: Linux 4.15.0-42-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 CurrentDesktop: GNOME-Flashback:GNOME Date: Thu Dec 6 11:08:42 2018 InstallationDate: Installed on 2018-11-26 (9 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1807076/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
