Phonon related crash (play audio file = crash)

.xsession-errors

knotify(5618)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-thor/ksycoca4"
Object::connect: No such signal org::freedesktop::UPower::DeviceAdded(QString)
Object::connect: No such signal org::freedesktop::UPower::DeviceRemoved(QString)
control point init error: "Failed to start SSDP" 

(knotify4:5618): GStreamer-CRITICAL **: gst_object_ref: assertion 'object != NULL' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_object_sink: assertion 'GST_IS_OBJECT (object)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_object_ref: assertion 'object != NULL' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_object_sink: assertion 'GST_IS_OBJECT (object)' failed

(knotify4:5618): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_bin_add: assertion 'GST_IS_ELEMENT (element)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_element_get_static_pad: assertion 'GST_IS_ELEMENT (element)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_ghost_pad_new: assertion 'GST_IS_PAD (target)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_element_add_pad: assertion 'GST_IS_PAD (pad)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_object_unref: assertion 'object != NULL' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_bin_add: assertion 'GST_IS_ELEMENT (element)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_element_get_static_pad: assertion 'GST_IS_ELEMENT (element)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_ghost_pad_new: assertion 'GST_IS_PAD (target)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_element_add_pad: assertion 'GST_IS_PAD (pad)' failed

(knotify4:5618): GStreamer-CRITICAL **: gst_object_unref: assertion 'object != NULL' failed
WARNING: Phonon::createPath: Cannot connect  Phonon::MediaObject ( no objectName ) to  Phonon::AudioOutput ( no objectName ). 
KCrash: Application 'knotify4' crashing...
KCrash: Attempting to start /run/current-system/sw/lib/kde4/libexec/drkonqi from kdeinit
KCrash: Connect sock_file=/home/thor/.kde/socket-Mjolnir/kdeinit4__0
kgpg(5593)/kdeui (KNotification) KNotification::slotReceivedIdError: Error while contacting notify daemon "Message did not receive a reply (timeout by message bus)" 
unnamed app(5617): Communication problem with  "knotify" , it probably crashed. 
Error message was:  "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" " 

drkonqi(5624) KCrashBackend::constructCrashedApplication: Using /proc to determine executable path
drkonqi(5624) KCrashBackend::constructCrashedApplication: Executable is: "/nix/store/vzca7z33ndy83lxliwq3jdqr6dwywxd3-kde-runtime-14.12.1/bin/knotify4"
drkonqi(5624) KCrashBackend::constructCrashedApplication: Executable exists: true
drkonqi(5624) DrKonqi::init: Enabling drkonqi crash catching