Exception updating thing's config parameters

Hi!

I’ve set up openHABian (OH 2.2.0) on a Pi 3 with a UZB stick as a controller. I’ve tried to get StellaZ thermostats under control, but with no success. The thermostat is recognized and included fine, as far a I can tell. All channels are available and can be bound to items, but device wakeup interval is set to 604620 seconds, and I’m unable to change that. Trying to update any configuration parameter (polling period, node name or location, etc) results in the following exception:

2018-02-19 21:18:16.539 [ERROR] [st.core.internal.thing.ThingResource] - Exception during HTTP PUT request for update config at 'things/zwave:device:fed6e7a8:node3/config'
java.lang.NullPointerException: null
        at org.eclipse.smarthome.config.xml.AbstractXmlBasedProvider.get(AbstractXmlBasedProvider.java:151) [108:org.eclipse.smarthome.config.xml:0.10.0.b1]
        at org.eclipse.smarthome.config.xml.AbstractXmlConfigDescriptionProvider.getConfigDescription(AbstractXmlConfigDescriptionProvider.java:50) [108:org.eclipse.smarthome.config.xml:0.10.0.b1]
        at org.eclipse.smarthome.config.core.ConfigDescriptionRegistry.getConfigDescription(ConfigDescriptionRegistry.java:152) [103:org.eclipse.smarthome.config.core:0.10.0.b1]
        at org.eclipse.smarthome.config.core.ConfigDescriptionRegistry.getConfigDescription(ConfigDescriptionRegistry.java:188) [103:org.eclipse.smarthome.config.core:0.10.0.b1]
        at org.eclipse.smarthome.io.rest.core.internal.thing.ThingResource.normalizeConfiguration(ThingResource.java:735) [126:org.eclipse.smarthome.io.rest.core:0.10.0.b1]
        at org.eclipse.smarthome.io.rest.core.internal.thing.ThingResource.updateConfiguration(ThingResource.java:415) [126:org.eclipse.smarthome.io.rest.core:0.10.0.b1]
        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:498) ~[?:?]
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) [177:org.glassfish.jersey.core.jersey-common:2.22.2]
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) [177:org.glassfish.jersey.core.jersey-common:2.22.2]
        at org.glassfish.jersey.internal.Errors.process(Errors.java:315) [177:org.glassfish.jersey.core.jersey-common:2.22.2]
        at org.glassfish.jersey.internal.Errors.process(Errors.java:297) [177:org.glassfish.jersey.core.jersey-common:2.22.2]
        at org.glassfish.jersey.internal.Errors.process(Errors.java:267) [177:org.glassfish.jersey.core.jersey-common:2.22.2]
        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) [177:org.glassfish.jersey.core.jersey-common:2.22.2]
        at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) [178:org.glassfish.jersey.core.jersey-server:2.22.2]
        at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) [175:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
        at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) [175:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) [175:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) [175:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) [175:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
        at com.eclipsesource.jaxrs.publisher.internal.ServletContainerBridge.service(ServletContainerBridge.java:76) [15:com.eclipsesource.jaxrs.publisher:5.3.1.201602281253]
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:848) [88:org.eclipse.jetty.servlet:9.3.22.v20171030]
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:584) [88:org.eclipse.jetty.servlet:9.3.22.v20171030]
        at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71) [191:org.ops4j.pax.web.pax-web-jetty:6.0.7]
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) [85:org.eclipse.jetty.security:9.3.22.v20171030]
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:284) [191:org.ops4j.pax.web.pax-web-jetty:6.0.7]
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512) [88:org.eclipse.jetty.servlet:9.3.22.v20171030]
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80) [191:org.ops4j.pax.web.pax-web-jetty:6.0.7]
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.server.Server.handle(Server.java:534) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:333) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) [87:org.eclipse.jetty.server:9.3.22.v20171030]
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283) [79:org.eclipse.jetty.io:9.3.22.v20171030]
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108) [79:org.eclipse.jetty.io:9.3.22.v20171030]
        at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) [79:org.eclipse.jetty.io:9.3.22.v20171030]
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303) [90:org.eclipse.jetty.util:9.3.22.v20171030]
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148) [90:org.eclipse.jetty.util:9.3.22.v20171030]
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136) [90:org.eclipse.jetty.util:9.3.22.v20171030]
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) [90:org.eclipse.jetty.util:9.3.22.v20171030]
        at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) [90:org.eclipse.jetty.util:9.3.22.v20171030]
        at java.lang.Thread.run(Thread.java:748) [?:?]

The same exception is mentioned at least here and here, but if either of them contains a solution, I can’t find it. I installed the latest snapshot of the Z-wave binding, to no effect.

Any ideas on where to look next would be appreciated.