startPedometerUpdatesFromDate

I am using startPedometerUpdatesFromDate, but why is the error message'[Connection] Error on message reply (Connection invalid)' displayed in the console window at runtime?


My Code

   if ([CMPedometer isStepCountingAvailable]) {
    [pedometer startPedometerUpdatesFromDate:currentDate withHandler:^(CMPedometerData * Nullable pedometerData, NSError * Nullable error) {
        if ([CMPedometer isStepCountingAvailable]) {
          if([pedometerData.numberOfSteps intValue] > 0)
          {
            stepCnt = [pedometerData.numberOfSteps intValue];
          }
        }
      }];     
  }



console message
[Connection] Error on message reply (Connection invalid)