Thank you for helping to triage and sorry for the late response.  I no longer have as much time for Launchpad as I used to.

Here are the last few lines from journalctl.  I hope they mean something to you.

Mar 23 03:26:35 work sudo[22956]: pam_unix(sudo:session): session closed for user root
Mar 23 03:27:00 work unity-scope-loa[10494]: daemon.vala:679: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.zeitgeist.Engine was not provided by any .service files
Mar 23 03:27:05 work compiz[2115]: ERROR 2019-03-23 03:27:05 unityfree <unknown>:0 g_sequence_get: assertion '!is_end (iter)' failed
Mar 23 03:27:05 work compiz[2115]: ERROR 2019-03-23 03:27:05 unity null <unknown>:0 Unable to get value. NULL row data in DeeSequenceModel@0x562b2e019ea0 at position 1. The row has probably been removed
Mar 23 03:27:05 work compiz[2115]: ERROR 2019-03-23 03:27:05 unity null <unknown>:0 Unable to get string. Column 5 in DeeSequenceModel@0x562b2e019ea0 holds a NULL value in row 1
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_type: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_unref: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_type: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_unref: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_type: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_unref: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_type: assertion 'value != NULL' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed
Mar 23 03:27:11 work gnome-control-c[22988]: g_variant_unref: assertion 'value != NULL' failed
Mar 23 03:27:12 work kernel: Bluetooth: hci0: last event is not cmd complete (0x0f)

And here is the CLI output you requested.

$ G_DEBUG_MESSAGES=all gnome-control-center bluetooth

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.558: g_variant_get_type: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.558: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.558: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.558: g_variant_unref: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.558: g_variant_get_type: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.558: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_unref: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_get_type: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_unref: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_get_type: assertion 'value != NULL' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_type_is_subtype_of: assertion 'g_variant_type_check (type)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_get_boolean: assertion 'g_variant_is_of_type (value, G_VARIANT_TYPE_BOOLEAN)' failed

(gnome-control-center:23143): GLib-CRITICAL **: 03:31:11.559: g_variant_unref: assertion 'value != NULL' failed