Error in Logs after startup

Hey there,
im a OH/OH2 Newbe, and this big error after restart appears in my logs.

18:29:05.084 [ERROR] [org.eclipse.smarthome.model.core ] - [org.eclipse.smarthome.model.core.folderobserver(101)] The addModelParser method has thrown an exception
java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:210)
at com.google.common.collect.Lists$TransformingSequentialList.(Lists.java:560)
at com.google.common.collect.Lists.transform(Lists.java:543)
at org.eclipse.xtext.xbase.lib.ListExtensions.map(ListExtensions.java:128)
at org.eclipse.smarthome.model.thing.internal.GenericThingProvider.createThingsFromModel(GenericThingProvider.java:290)
at org.eclipse.smarthome.model.thing.internal.GenericThingProvider.modelChanged(GenericThingProvider.java:786)
at org.eclipse.smarthome.model.core.internal.ModelRepositoryImpl.notifyListeners(ModelRepositoryImpl.java:207)
at org.eclipse.smarthome.model.core.internal.ModelRepositoryImpl.addOrRefreshModel(ModelRepositoryImpl.java:99)
at org.eclipse.smarthome.model.core.internal.folder.FolderObserver.checkFile(FolderObserver.java:270)
at org.eclipse.smarthome.model.core.internal.folder.FolderObserver.processIgnoredFiles(FolderObserver.java:94)
at org.eclipse.smarthome.model.core.internal.folder.FolderObserver.addModelParser(FolderObserver.java:79)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_111]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_111]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_111]
at java.lang.reflect.Method.invoke(Method.java:498)[:1.8.0_111]
at org.apache.felix.scr.impl.inject.BaseMethod.invokeMethod(BaseMethod.java:224)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.inject.BaseMethod.access$500(BaseMethod.java:39)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.inject.BaseMethod$Resolved.invoke(BaseMethod.java:617)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.inject.BaseMethod.invoke(BaseMethod.java:501)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.inject.BindMethod.invoke(BindMethod.java:655)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.DependencyManager.doInvokeBindMethod(DependencyManager.java:1722)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.java:1699)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.SingleComponentManager.invokeBindMethod(SingleComponentManager.java:371)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:320)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:291)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1215)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1136)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:945)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:881)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1167)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComponentActivator.java:127)[32:org.apache.felix.scr:2.0.6]
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:914)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:464)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:886)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:873)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:132)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:940)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:740)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractComponentManager.java:674)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:429)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:657)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:341)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:403)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.Activator.access$200(Activator.java:54)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:278)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.utils.extender.AbstractExtender.createExtension(AbstractExtender.java:259)[32:org.apache.felix.scr:2.0.6]
at org.apache.felix.utils.extender.AbstractExtender.modifiedBundle(AbstractExtender.java:232)[32:org.apache.felix.scr:2.0.6]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:482)[org.osgi.core-6.0.0.jar:]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:415)[org.osgi.core-6.0.0.jar:]
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232)[org.osgi.core-6.0.0.jar:]
at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:444)[org.osgi.core-6.0.0.jar:]
at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:902)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:165)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:75)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:67)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:102)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.Module.publishEvent(Module.java:466)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.Module.start(Module.java:457)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1562)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1476)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]

Im not quite sure, whats the meaning and if or how to fix this. Any suggestions?

Greetings