SignalR The exception was not handled due to missing method call in android
as Signalr Provided method is doOnError not OnError in android,
the help will be appreciated thanks
SignalR The exception was not handled due to missing onError handler in the subscribe() method Android
FATAL EXCEPTION: pool-19-thread-1
Process: com.gagamuller.plan.app, PID: 21170
io.reactivex.rxjava3.exceptions.OnErrorNotImplementedException: The exception was not handled due to missing 
method call. Further reading: https://github.com/ReactiveX/RxJava/wiki/Error-Handling | com.microsoft.signalr.HubException: An unexpected error occurred invoking ‘Subscribe’ on the server. NullReferenceException: Object reference not set to an instance of an object.
at io.reactivex.rxjava3.internal.observers.EmptyCompletableObserver.onError(EmptyCompletableObserver.java:50)
at io.reactivex.rxjava3.subjects.CompletableSubject.onError(CompletableSubject.java:126)
at com.microsoft.signalr.HubConnection.lambda$invoke$19(HubConnection.java:669)
at com.microsoft.signalr.HubConnection$$ExternalSyntheticLambda17.accept(Unknown Source:4)
at io.reactivex.rxjava3.internal.observers.LambdaObserver.onError(LambdaObserver.java:77)
at io.reactivex.rxjava3.subjects.ReplaySubject$UnboundedReplayBuffer.replay(ReplaySubject.java:782)
at io.reactivex.rxjava3.subjects.ReplaySubject.onError(ReplaySubject.java:385)
at com.microsoft.signalr.InvocationRequest.complete(InvocationRequest.java:29)
at com.microsoft.signalr.HubConnection.ReceiveLoop(HubConnection.java:492)
at com.microsoft.signalr.HubConnection.lambda$new$0$com-microsoft-signalr-HubConnection(HubConnection.java:162)
at com.microsoft.signalr.HubConnection$$ExternalSyntheticLambda32.invoke(Unknown Source:2)
at com.microsoft.signalr.LongPollingTransport.onReceive(LongPollingTransport.java:162)
at com.microsoft.signalr.LongPollingTransport.lambda$poll$8$com-microsoft-signalr-LongPollingTransport(LongPollingTransport.java:117)
at com.microsoft.signalr.LongPollingTransport$$ExternalSyntheticLambda13.run(Unknown Source:4)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:487)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by: com.microsoft.signalr.HubException: An unexpected error occurred invoking ‘Subscribe’ on the server. NullReferenceException: Object reference not set to an instance of an object.
at com.microsoft.signalr.InvocationRequest.complete(InvocationRequest.java:29)
at com.microsoft.signalr.HubConnection.ReceiveLoop(HubConnection.java:492)
at com.microsoft.signalr.HubConnection.lambda$new$0$com-microsoft-signalr-HubConnection(HubConnection.java:162)
at com.microsoft.signalr.HubConnection$$ExternalSyntheticLambda32.invoke(Unknown Source:2)
at com.microsoft.signalr.LongPollingTransport.onReceive(LongPollingTransport.java:162)
at com.microsoft.signalr.LongPollingTransport.lambda$poll$8$com-microsoft-signalr-LongPollingTransport(LongPollingTransport.java:117)
at com.microsoft.signalr.LongPollingTransport$$ExternalSyntheticLambda13.run(Unknown Source:4)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:487)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)