Fatal Exception: java.lang.RuntimeException: Internal error in Firestore (0.6.6-dev). at com.google.firebase.firestore.util.AsyncQueue.lambda$panic$5(com.google.firebase:firebase-firestore@@18.0.1:379) at com.google.firebase.firestore.util.AsyncQueue$$Lambda$5.run(Unknown Source:2) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6938) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 

Caused by java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'io.grpc.LoadBalancer$PickResult io.grpc.LoadBalancer$SubchannelPicker.pickSubchannel(io.grpc.LoadBalancer$PickSubchannelArgs)' on a null object reference at com.google.firebase.firestore.util.AsyncQueue.lambda$enqueue$3(com.google.firebase:firebase-firestore@@18.0.1:290) at com.google.firebase.firestore.util.AsyncQueue$$Lambda$3.run(Unknown Source:4) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at com.google.firebase.firestore.util.AsyncQueue$DelayedStartFactory.run(com.google.firebase:firebase-firestore@@18.0.1:205) at java.lang.Thread.run(Thread.java:764) 

Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'io.grpc.LoadBalancer$PickResult io.grpc.LoadBalancer$SubchannelPicker.pickSubchannel(io.grpc.LoadBalancer$PickSubchannelArgs)' on a null object reference at io.grpc.internal.DelayedClientTransport.newStream(DelayedClientTransport.java:149) at io.grpc.internal.ClientCallImpl.start(ClientCallImpl.java:245) at io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1.start(CensusTracingModule.java:392) at io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1.start(CensusStatsModule.java:673) at com.google.firebase.firestore.util.FirestoreChannel.runBidiStreamingRpc(com.google.firebase:firebase-firestore@@18.0.1:136) at com.google.firebase.firestore.remote.AbstractStream.start(com.google.firebase:firebase-firestore@@18.0.1:245) at com.google.firebase.firestore.remote.WatchStream.start(com.google.firebase:firebase-firestore@@18.0.1:39) at com.google.firebase.firestore.remote.RemoteStore.startWatchStream(com.google.firebase:firebase-firestore@@18.0.1:409) at com.google.firebase.firestore.remote.RemoteStore.enableNetwork(com.google.firebase:firebase-firestore@@18.0.1:234) at com.google.firebase.firestore.remote.RemoteStore.restartNetwork(com.google.firebase:firebase-firestore@@18.0.1:280) at com.google.firebase.firestore.remote.RemoteStore.lambda$new$0(com.google.firebase:firebase-firestore@@18.0.1:220) at com.google.firebase.firestore.remote.RemoteStore$$Lambda$3.run(Unknown Source:2) at com.google.firebase.firestore.util.AsyncQueue.lambda$enqueue$4(com.google.firebase:firebase-firestore@@18.0.1:311) at com.google.firebase.firestore.util.AsyncQueue$$Lambda$4.call(Unknown Source:2) at com.google.firebase.firestore.util.AsyncQueue.lambda$enqueue$3(com.google.firebase:firebase-firestore@@18.0.1:287) at com.google.firebase.firestore.util.AsyncQueue$$Lambda$3.run(Unknown Source:4) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at com.google.firebase.firestore.util.AsyncQueue$DelayedStartFactory.run(com.google.firebase:firebase-firestore@@18.0.1:205) at java.lang.Thread.run(Thread.java:764)