Hi,
I’ve been using openhab for couple months now. Recently installed the harmony binding which works with my hub. It worked and via the control page of the paper UI i was able to start an activity and/or send commands to devices. Now I’m not sure what happened but suddonly I get error messages, and the PaperUI control page hangs most of the time. When sending a command to device via the harmony hub I get following error messages, but can’t seem to find where my problems is: any advice? Been trying fix for hours 
17:51:39.130 [ERROR] [ome.core.thing.internal.ThingManager] - Exception occurred while calling handler: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@184362b rejected from java.util.concurrent.ScheduledThreadPoolExecutor@1b6dc83[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 6]
java.util.concurrent.ExecutionException: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@184362b rejected from java.util.concurrent.ScheduledThreadPoolExecutor@1b6dc83[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 6]
at org.eclipse.smarthome.core.common.SafeMethodCaller.executeDirectly(SafeMethodCaller.java:220)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.common.SafeMethodCaller.callAsynchronous(SafeMethodCaller.java:189)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:83)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:67)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.thing.internal.ThingManager.receiveCommand(ThingManager.java:374)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
at org.eclipse.smarthome.core.items.events.AbstractItemEventSubscriber.receive(AbstractItemEventSubscriber.java:47)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:192)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:1)[98:org.eclipse.smarthome.core:0.9.0.b5]
at org.eclipse.smarthome.core.common.SafeMethodCaller$CallableWrapper.call(SafeMethodCaller.java:181)[98:org.eclipse.smarthome.core:0.9.0.b5]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[:1.8.0_144]
at java.lang.Thread.run(Thread.java:748)[:1.8.0_144]
Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@184362b rejected from java.util.concurrent.ScheduledThreadPoolExecutor@1b6dc83[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 6]
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)[:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)[:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:326)[:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:533)[:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor.execute(ScheduledThreadPoolExecutor.java:622)[:1.8.0_144]
at java.util.concurrent.Executors$DelegatedExecutorService.execute(Executors.java:668)[:1.8.0_144]
at org.openhab.binding.harmonyhub.handler.HarmonyHubHandler.pressButton(HarmonyHubHandler.java:334)[188:org.openhab.binding.harmonyhub:2.1.0]
at org.openhab.binding.harmonyhub.handler.HarmonyDeviceHandler.handleCommand(HarmonyDeviceHandler.java:97)[188:org.openhab.binding.harmonyhub:2.1.0]
at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:377)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:1)[105:org.eclipse.smarthome.core.thing:0.9.0.b5]
at org.eclipse.smarthome.core.common.SafeMethodCaller.executeDirectly(SafeMethodCaller.java:218)[98:org.eclipse.smarthome.core:0.9.0.b5]
… 12 more