Thymeleaf fails loading version from properties

03.12.2015 23:01:07.519 *INFO* [Background Install ...] org.apache.sling.scripting.core.impl.ScriptEngineManagerFactory Adding ScriptEngine Apache Sling Scripting Thymeleaf, 0.1.7-SNAPSHOT for language Thymeleaf, null
[...]
03.12.2015 23:01:07.522 *ERROR* [Background Install ...] org.apache.sling.scripting.core [org.apache.sling.scripting.core.impl.ScriptEngineManagerFactory(135)] The bindScriptEngineFactory method has thrown an exception (java.lang.NullPointerException)
java.lang.NullPointerException: null
	at java.util.Hashtable.put(Hashtable.java:459)
	at org.apache.sling.scripting.core.impl.ScriptEngineManagerFactory.postEvent(ScriptEngineManagerFactory.java:305)
	at org.apache.sling.scripting.core.impl.ScriptEngineManagerFactory.bindScriptEngineFactory(ScriptEngineManagerFactory.java:263)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:222)
	at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:37)
	at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:615)
	at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:499)
	at org.apache.felix.scr.impl.helper.BindMethod.invoke(BindMethod.java:41)
	at org.apache.felix.scr.impl.manager.DependencyManager.doInvokeBindMethod(DependencyManager.java:1660)
	at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.java:1636)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.invokeBindMethod(SingleComponentManager.java:370)
	at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:319)
	at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:295)
	at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1215)
	at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1136)
	at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:945)
	at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:881)
	at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1167)
	at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComponentActivator.java:120)
	at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:987)
	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
	at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
	at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4560)
	at org.apache.felix.framework.Felix.registerService(Felix.java:3542)
	at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:869)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:857)
	at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:133)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:915)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:715)
	at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:330)
	at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:295)
	at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1215)
	at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1136)
	at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:945)
	at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:881)
	at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1167)
	at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComponentActivator.java:120)
	at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:987)
	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
	at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
	at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4560)
	at org.apache.felix.framework.Felix.registerService(Felix.java:3542)
	at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:869)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:857)
	at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:133)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:915)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:715)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:399)
	at org.apache.felix.scr.impl.config.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:676)
	at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:339)
	at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:360)
	at org.apache.felix.scr.impl.Activator.access$000(Activator.java:53)
	at org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:260)
	at org.apache.felix.utils.extender.AbstractExtender.createExtension(AbstractExtender.java:259)
	at org.apache.felix.utils.extender.AbstractExtender.modifiedBundle(AbstractExtender.java:232)
	at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:482)
	at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:415)
	at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232)
	at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:444)
	at org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:913)
	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:834)
	at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:516)
	at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4544)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:2166)
	at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:977)
	at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:964)
	at org.apache.felix.webconsole.internal.core.InstallHelper.doRun(InstallHelper.java:67)
	at org.apache.felix.webconsole.internal.core.BaseUpdateInstallHelper.doRun(BaseUpdateInstallHelper.java:93)
	at org.apache.felix.webconsole.internal.core.BaseUpdateInstallHelper.run(BaseUpdateInstallHelper.java:123)
	at java.lang.Thread.run(Thread.java:745)