errors constantly appear. How to fix it ? tell me in advance thanks
2020-03-16 10:25:30.324 [INFO ] [roker.internal.EmbeddedBrokerService] - Broker persistence file: mqttembedded.bin
2020-03-16 10:25:30.360 [ERROR] [org.openhab.io.mqttembeddedbroker ] - bundle org.openhab.io.mqttembeddedbroker:2.5.2 (227)[org.openhab.io.mqttembeddedbroker.internal.EmbeddedBrokerService(6)] : Error during instantiation of the implementation object
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_152]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_152]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_152]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_152]
at org.apache.felix.scr.impl.inject.ComponentConstructor.newInstance(ComponentConstructor.java:309) ~[bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:277) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:114) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:982) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:955) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:756) [bundleFile:?]
at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:1045) [bundleFile:?]
at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:999) [bundleFile:?]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1216) [bundleFile:?]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1137) [bundleFile:?]
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:944) [bundleFile:?]
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:880) [bundleFile:?]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1168) [bundleFile:?]
at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComponentActivator.java:125) [bundleFile:?]
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:920) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:469) [org.eclipse.osgi-3.12.100.jar:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:906) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:892) [bundleFile:?]
at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:128) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:959) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:732) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractComponentManager.java:666) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:432) [bundleFile:?]
at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:665) [bundleFile:?]
at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:338) [bundleFile:?]
at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:382) [bundleFile:?]
at org.apache.felix.scr.impl.Activator.access$200(Activator.java:49) [bundleFile:?]
at org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:264) [bundleFile:?]
at org.apache.felix.scr.impl.AbstractExtender.createExtension(AbstractExtender.java:196) [bundleFile:?]
at org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:169) [bundleFile:?]
at org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:49) [bundleFile:?]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:482) [osgi.core-6.0.0.jar:?]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:415) [osgi.core-6.0.0.jar:?]
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232) [osgi.core-6.0.0.jar:?]
at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:444) [osgi.core-6.0.0.jar:?]
at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:908) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:213) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:120) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:112) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:168) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.Module.publishEvent(Module.java:476) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.Module.start(Module.java:467) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1634) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1614) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1585) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1528) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340) [org.eclipse.osgi-3.12.100.jar:?]
Caused by: java.lang.NullPointerException
at io.moquette.broker.Server.startServer(Server.java:172) ~[?:?]
at org.openhab.io.mqttembeddedbroker.internal.EmbeddedBrokerService.startEmbeddedServer(EmbeddedBrokerService.java:304) ~[?:?]
at org.openhab.io.mqttembeddedbroker.internal.EmbeddedBrokerService.initialize(EmbeddedBrokerService.java:190) ~[?:?]
at org.openhab.io.mqttembeddedbroker.internal.EmbeddedBrokerService.(EmbeddedBrokerService.java:149) ~[?:?]