java.lang.IllegalStateException: displayName must not be null

[pys200603027]

Platform:Android 9

  --------- beginning of crash
2020-08-20 18:09:48.210 28937-28937/com.android.samples.mediastore E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.android.samples.mediastore, PID: 28937
    java.lang.IllegalStateException: displayName must not be null
        at com.android.samples.mediastore.MainActivityViewModel$queryImages$2.invokeSuspend(MainActivityViewModel.kt:197)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:241)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:594)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.access$runSafely(CoroutineScheduler.kt:60)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:740)
2020-08-20 18:09:48.221 28937-28937/com.android.samples.mediastore I/Process: killProcess pid=28937
    java.lang.RuntimeException
        at android.os.Process.killProcess(Process.java:1005)
        at com.android.internal.os.RuntimeInit$KillApplicationHandler.uncaughtException(RuntimeInit.java:157)
        at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1068)
        at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1063)
        at kotlinx.coroutines.android.AndroidExceptionPreHandler.handleException(AndroidExceptionPreHandler.kt:40)
        at kotlinx.coroutines.CoroutineExceptionHandlerImplKt.handleCoroutineExceptionImpl(CoroutineExceptionHandlerImpl.kt:30)
        at kotlinx.coroutines.CoroutineExceptionHandlerKt.handleCoroutineException(CoroutineExceptionHandler.kt:33)
        at kotlinx.coroutines.StandaloneCoroutine.handleJobException(Builders.common.kt:184)
        at kotlinx.coroutines.JobSupport.tryFinalizeFinishingState(JobSupport.kt:226)
        at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:849)
        at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:811)
        at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:787)
        at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:111)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
        at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:334)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:196)
        at android.app.ActivityThread.main(ActivityThread.java:7334)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:870)