i got this one
gnome-control-center -v online-accounts
(gnome-control-center:10866): Gtk-WARNING **: 19:11:48.589: Theme parser error: gtk.css:5189:48-49: Expected a valid selector
(gnome-control-center:10866): cc-wwan-panel-WARNING **: 19:11:48.922: Error connecting to ModemManager: Fehler beim Aufruf von StartServiceByName für org.freedesktop.ModemManager1: Unit dbus-org.freedesktop.ModemManager1.service not found.
GLib-GIO: _g_io_module_get_default: Found default implementation dconf (DConfSettingsBackend) for ?gsettings-backend?GoaBackend: Loading all providers: GoaBackend: - googleGoaBackend: - owncloudGoaBackend: - windows_liveGoaBackend: - exchangeGoaBackend: - lastfmGoaBackend: - imap_smtpGoaBackend: - kerberosGoaBackend: activated kerberos providerGoaBackend: - media-serverGLib-GIO: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3)19:11:49.0883 (null): DEBUG: No extra argument
19:11:49.0890 diagnostics-cc-panel: DEBUG: ABRT vanished
i’ve opened a thread here yesterday