app crashes while retrieve downloadURL.result

As soon as I try to retrieve the downloadUrl of my upload (upload works fine) with downloadUrl.result the app crashes. The app does not crash when using downloadUrl.toString() instead but that does not give me the downloadUrl as a String. I have read through forums where people had similar problems but I could not resolve mine. Thank you in advance

private fun uploadImageToFirebase(){
    val profileImageRef = FirebaseStorage.getInstance().getReference("profilepics/" + System.currentTimeMillis() + ".jpg")

    if (uriProfileImage != null) {
        profileImageRef.putFile(uriProfileImage!!)
                .addOnSuccessListener { taskSnapshot ->
                    profileImageUrl = taskSnapshot.metadata?.reference?.downloadUrl?.result
                }
                .addOnFailureListener { e ->
                    Toast.makeText(context, e.message, Toast.LENGTH_SHORT).show()
                }
    }
}

debug:

--------- beginning of crash

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.kelbel.frederik.coinz, PID: 17449
    java.lang.IllegalStateException: Task is not yet complete
        at com.google.android.gms.common.internal.Preconditions.checkState(Unknown Source)
        at com.google.android.gms.tasks.zzu.zzb(Unknown Source)
        at com.google.android.gms.tasks.zzu.getResult(Unknown Source)
        at com.example.kelbel.frederik.coinz.FragmentSettings$uploadImageToFirebase$1.onSuccess(FragmentSettings.kt:121)
        at com.example.kelbel.frederik.coinz.FragmentSettings$uploadImageToFirebase$1.onSuccess(FragmentSettings.kt:35)
        at com.google.firebase.storage.StorageTask.zza(com.google.firebase:firebase-storage@@16.0.2:123)
        at com.google.firebase.storage.zze.zza(com.google.firebase:firebase-storage@@16.0.2)
        at com.google.firebase.storage.zzv.zza(com.google.firebase:firebase-storage@@16.0.2:89)
        at com.google.firebase.storage.zzy.run(com.google.firebase:firebase-storage@@16.0.2)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6119)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

logcat:

2018-10-05 16:29:53.732 31185-31758/system_process W/ActivityManager:   Force finishing activity com.example.kelbel.frederik.coinz/.ProfileActivity
2018-10-05 16:29:53.855 31185-18160/system_process I/OpenGLRenderer: Initialized EGL, version 1.4
2018-10-05 16:29:53.855 31185-18160/system_process D/OpenGLRenderer: Swap behavior 1
2018-10-05 16:29:53.855 31185-18160/system_process W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
2018-10-05 16:29:53.855 31185-18160/system_process D/OpenGLRenderer: Swap behavior 0
2018-10-05 16:29:53.876 31185-18160/system_process D/EGL_emulation: eglCreateContext: 0x96bc2160: maj 2 min 0 rcv 2
2018-10-05 16:29:53.907 31185-18160/system_process D/EGL_emulation: eglMakeCurrent: 0x96bc2160: ver 2 0 (tinfo 0x9246d0e0)
2018-10-05 16:29:53.915 31185-18160/system_process D/EGL_emulation: eglMakeCurrent: 0x96bc2160: ver 2 0 (tinfo 0x9246d0e0)
2018-10-05 16:29:54.246 31185-31207/system_process W/ActivityManager: Activity pause timeout for ActivityRecord{5a43b89 u0 com.example.kelbel.frederik.coinz/.ProfileActivity t153 f}
2018-10-05 16:29:54.271 1311-1339/? D/gralloc_ranchu: gralloc_alloc: Creating ashmem region of size 4784128
2018-10-05 16:29:54.296 1311-1311/? E/EGL_emulation: tid 1311: eglCreateSyncKHR(1962): error 0x3004 (EGL_BAD_ATTRIBUTE)
2018-10-05 16:29:54.399 31727-31930/com.google.android.googlequicksearchbox:search D/EGL_emulation: eglMakeCurrent: 0xa6474700: ver 2 0 (tinfo 0x92a170a0)
2018-10-05 16:29:54.517 31727-31727/com.google.android.googlequicksearchbox:search I/OptInState: There is a new client and it does not support opt-in. Dropping request.
2018-10-05 16:29:54.530 31727-17556/com.google.android.googlequicksearchbox:search W/LocationOracle: No location history returned by ContextManager
2018-10-05 16:29:54.538 31727-31727/com.google.android.googlequicksearchbox:search I/MicroDetectionWorker: Micro detection mode: [mDetectionMode: [1]].
2018-10-05 16:29:54.539 31727-31727/com.google.android.googlequicksearchbox:search I/AudioController: Using mInputStreamFactoryBuilder
2018-10-05 16:29:54.553 31727-17936/com.google.android.googlequicksearchbox:search I/MicroRecognitionRunner: Starting detection.
2018-10-05 16:29:54.562 31727-9036/com.google.android.googlequicksearchbox:search I/MicrophoneInputStream: mic_starting com.google.android.apps.gsa.staticplugins.z.c@88e0935
2018-10-05 16:29:54.571 30990-17939/? I/AudioFlinger: AudioFlinger's thread 0xa7383e00 ready to run
2018-10-05 16:29:54.577 30990-2569/? E/AudioFlinger: not enough memory for AudioTrack size=131296
2018-10-05 16:29:54.578 30990-2569/? D/MemoryDealer:   AudioTrack (0xae19cef0, size=4194304)
        0: 0xae19cf00 | 0x00000000 | 0x000200E0 | A 
        1: 0xae19cf20 | 0x000200E0 | 0x000200E0 | A 
        2: 0xae19cdd0 | 0x000401C0 | 0x000200E0 | A 
        3: 0xae19cb90 | 0x000602A0 | 0x000200E0 | A 
        4: 0xad889180 | 0x00080380 | 0x000200E0 | A 
        5: 0xae1ff270 | 0x000A0460 | 0x000200E0 | A 
        6: 0xae1ff460 | 0x000C0540 | 0x000200E0 | A 
        7: 0xae1ff500 | 0x000E0620 | 0x000200E0 | A 
        8: 0xae1ff650 | 0x00100700 | 0x000200E0 | A 
        9: 0xae1ff980 | 0x001207E0 | 0x000200E0 | A 
       10: 0xae1ff9a0 | 0x001408C0 | 0x000200E0 | A 
       11: 0xae1ff820 | 0x001609A0 | 0x000200E0 | A 
       12: 0xae1ff860 | 0x00180A80 | 0x000200E0 | A 
       13: 0xad889350 | 0x001A0B60 | 0x000200E0 | A 
       14: 0xae1ffe40 | 0x001C0C40 | 0x000200E0 | A 
       15: 0xae1ffd10 | 0x001E0D20 | 0x000200E0 | A 
       16: 0xab0600d0 | 0x00200E00 | 0x000200E0 | A 
       17: 0xab060150 | 0x00220EE0 | 0x000200E0 | A 
       18: 0xab060450 | 0x00240FC0 | 0x000200E0 | A 
       19: 0xad8895b0 | 0x002610A0 | 0x000200E0 | A 

2018-10-05 16:29:54.579 30990-2569/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
2018-10-05 16:29:54.579 31727-9036/com.google.android.googlequicksearchbox:search E/AudioRecord: AudioFlinger could not create record track, status: -12
2018-10-05 16:29:54.584 31727-9036/com.google.android.googlequicksearchbox:search E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
2018-10-05 16:29:54.584 31727-9036/com.google.android.googlequicksearchbox:search E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
2018-10-05 16:29:54.584 31727-9036/com.google.android.googlequicksearchbox:search I/MicrophoneInputStream: mic_started com.google.android.apps.gsa.staticplugins.z.c@88e0935
2018-10-05 16:29:54.585 31727-9036/com.google.android.googlequicksearchbox:search E/ActivityThread: Failed to find provider info for com.google.android.apps.gsa.testing.ui.audio.recorded
2018-10-05 16:29:54.586 31727-31727/com.google.android.googlequicksearchbox:search I/MicroDetectionWorker: onReady
2018-10-05 16:29:54.591 31706-31796/com.google.android.apps.nexuslauncher D/EGL_emulation: eglMakeCurrent: 0xb5b05420: ver 2 0 (tinfo 0xb5b033c0)
2018-10-05 16:29:54.620 31727-31746/com.google.android.googlequicksearchbox:search I/art: Background sticky concurrent mark sweep GC freed 4987(326KB) AllocSpace objects, 0(0B) LOS objects, 5% free, 18MB/19MB, paused 6.573ms total 64.756ms
2018-10-05 16:29:54.623 31727-9036/com.google.android.googlequicksearchbox:search I/MicrophoneInputStream: mic_close com.google.android.apps.gsa.staticplugins.z.c@88e0935
2018-10-05 16:29:54.625 31727-17936/com.google.android.googlequicksearchbox:search I/MicroRecognitionRunner: Detection finished
2018-10-05 16:29:54.625 31580-31911/com.google.android.gms.persistent W/GCoreFlp: No location to return for getLastLocation()
2018-10-05 16:29:54.625 31727-17936/com.google.android.googlequicksearchbox:search W/ErrorReporter: reportError [type: 211, code: 524300]: Error reading from input stream
2018-10-05 16:29:54.626 31727-31988/com.google.android.googlequicksearchbox:search I/MicroRecognitionRunner: Stopping hotword detection.
2018-10-05 16:29:54.626 31727-17936/com.google.android.googlequicksearchbox:search W/ErrorProcessor: onFatalError, processing error from engine(4)
    com.google.android.apps.gsa.shared.speech.a.g: Error reading from input stream
        at com.google.android.apps.gsa.staticplugins.recognizer.i.a.a(SourceFile:342)
        at com.google.android.apps.gsa.staticplugins.recognizer.i.a$1.run(SourceFile:1367)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at com.google.android.apps.gsa.shared.util.concurrent.a.ak.run(SourceFile:66)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
        at java.lang.Thread.run(Thread.java:761)
        at com.google.android.apps.gsa.shared.util.concurrent.a.ad$1.run(SourceFile:85)
     Caused by: com.google.android.apps.gsa.shared.exception.GsaIOException: Error code: 393238 | Buffer overflow, no available space.
        at com.google.android.apps.gsa.speech.audio.Tee.g(SourceFile:2531)
        at com.google.android.apps.gsa.speech.audio.ap.read(SourceFile:555)
        at java.io.InputStream.read(InputStream.java:101)
        at com.google.android.apps.gsa.speech.audio.al.run(SourceFile:362)
        at com.google.android.apps.gsa.speech.audio.ak$1.run(SourceFile:471)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at com.google.android.apps.gsa.shared.util.concurrent.a.ak.run(SourceFile:66)
        at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:139)
        at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:139)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 
        at java.lang.Thread.run(Thread.java:761) 
        at com.google.android.apps.gsa.shared.util.concurrent.a.ad$1.run(SourceFile:85) 
2018-10-05 16:29:54.626 31727-17936/com.google.android.googlequicksearchbox:search I/AudioController: internalShutdown
2018-10-05 16:29:54.631 31727-31727/com.google.android.googlequicksearchbox:search I/MicroDetector: Keeping mic open: false
2018-10-05 16:29:54.631 31727-31727/com.google.android.googlequicksearchbox:search I/MicroDetectionWorker: #onError(false)
2018-10-05 16:29:54.631 31727-17935/com.google.android.googlequicksearchbox:search I/DeviceStateChecker: DeviceStateChecker cancelled
2018-10-05 16:29:54.646 31580-31911/com.google.android.gms.persistent W/GCoreFlp: No location to return for getLastLocation()
2018-10-05 16:29:54.930 30990-31005/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 79985503 , only wrote 79832880

I solved it now. The task was not finished yet. That is why i could not retrieve the downloadUrl. Added an OnCompleteListener...

    taskSnapshot.storage.downloadUrl.addOnCompleteListener{
                            task -> if(task.isSuccessful){
                            profileImageUrl = task.result
                        }else{
                            Log.d("Crash", "Crash starts here")
                        }