I was unable to reconnect to my WiFi network this morning via the network manager UI, so I manually restarted network-manager via the console. I then received the following crash from kdeinit5.

Hope this helps!

Application: kdeinit5 (kdeinit5), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f65781ce780 (LWP 2720))]

Thread 4 (Thread 0x7f654e0a4700 (LWP 2842)):
#0  0x00007f657624f27d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f657267e073 in ?? () from /usr/lib/nvidia-390/tls/libnvidia-tls.so.390.77
#2  0x00007f6572b166f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6572ad2e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6572ad3330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6572ad349c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f65767e90bb in QEventDispatcherGlib::processEvents (this=0x7f65480008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f65767905ba in QEventLoop::exec (this=this@entry=0x7f654e0a3e30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#8  0x00007f65765c55e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#9  0x00007f65765d0727 in QThreadPrivate::start (arg=0x1945550) at thread/qthread_unix.cpp:367
#10 0x00007f65746b26ba in start_thread (arg=0x7f654e0a4700) at pthread_create.c:333
#11 0x00007f657625f41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f655ace7700 (LWP 2726)):
#0  0x00007f657625374d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6572ad338c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6572ad349c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f65767e90bb in QEventDispatcherGlib::processEvents (this=0x7f65540008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f65767905ba in QEventLoop::exec (this=this@entry=0x7f655ace6e00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f65765c55e4 in QThread::exec (this=this@entry=0x7f656d1c3d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:525
#6  0x00007f656cf4af35 in QDBusConnectionManager::run (this=0x7f656d1c3d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#7  0x00007f65765d0727 in QThreadPrivate::start (arg=0x7f656d1c3d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:367
#8  0x00007f65746b26ba in start_thread (arg=0x7f655ace7700) at pthread_create.c:333
#9  0x00007f657625f41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f65628f2700 (LWP 2723)):
#0  0x00007f657625374d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6577658c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f657765a8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6565939489 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f65765d0727 in QThreadPrivate::start (arg=0x178ba20) at thread/qthread_unix.cpp:367
#5  0x00007f65746b26ba in start_thread (arg=0x7f65628f2700) at pthread_create.c:333
#6  0x00007f657625f41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f65781ce780 (LWP 2720)):
[KCrash Handler]
#6  0x00007f657618d428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#7  0x00007f657618f02a in __GI_abort () at abort.c:89
#8  0x00007f65765a290d in qt_message_fatal (context=..., message=<synthetic pointer>) at global/qlogging.cpp:1842
#9  QMessageLogger::fatal (this=this@entry=0x7fff2b681f00, msg=msg@entry=0x7f656cfaa3b0 "Internal error: got invalid meta type %d (%s) when trying to convert to meta type %d (%s)") at global/qlogging.cpp:880
#10 0x00007f656cf56948 in QDBusConnectionPrivate::deliverCall (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:953
#11 0x00007f65767bffb9 in QObject::event (this=0x1c7c3a0, e=<optimized out>) at kernel/qobject.cpp:1251
#12 0x00007f6574c2539c in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x1c7c3a0, e=0x7f65540874a0) at kernel/qapplication.cpp:3727
#13 0x00007f6574c2cab0 in QApplication::notify (this=0x7fff2b682610, receiver=0x1c7c3a0, e=0x7f65540874a0) at kernel/qapplication.cpp:3486
#14 0x00007f6576792228 in QCoreApplication::notifyInternal2 (receiver=0x1c7c3a0, event=event@entry=0x7f65540874a0) at kernel/qcoreapplication.cpp:1048
#15 0x00007f6576794e2e in QCoreApplication::sendEvent (event=0x7f65540874a0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x16c7900) at kernel/qcoreapplication.cpp:1745
#17 0x00007f65767952a8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1599
#18 0x00007f65767e9a93 in postEventSourceDispatch (s=0x17ca880) at kernel/qeventdispatcher_glib.cpp:276
#19 0x00007f6572ad3197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f6572ad33f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f6572ad349c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f65767e909f in QEventDispatcherGlib::processEvents (this=0x17c7590, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#23 0x00007f65659c29a1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#24 0x00007f65767905ba in QEventLoop::exec (this=this@entry=0x7fff2b682510, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#25 0x00007f65767996c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#26 0x00007f6565e6e40c in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kded5.so
#27 0x0000000000408669 in ?? ()
#28 0x00000000004054a7 in ?? ()
#29 0x00007f6576178830 in __libc_start_main (main=0x404600, argc=5, argv=0x7fff2b682b48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2b682b38) at ../csu/libc-start.c:291
#30 0x0000000000405c69 in _start ()