Exception in openHAB start

  • Platform information:
    • Hardware: Intel® Core™ i7-6500U CPU @ 2.50GHz, 2592 Mhz, 2 core, 4 processori logici
    • OS: Windows 10 Home
    • Java Runtime Environment: jdk1.8.0_144
    • openHAB version: OH2 2.1.0

Good morning,
At start openHAB write this in the log:
2017-10-30 07:17:24.286 [ERROR] [.eclipse.smarthome.io.transport.mdns] - [org.eclipse.smarthome.io.transport.mdns.client(97)] The activate method has thrown an exception
java.lang.IllegalStateException: No mDNS service has been started
at org.eclipse.smarthome.io.transport.mdns.internal.MDNSClientImpl.activate(MDNSClientImpl.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498)[:1.8.0_144]
at org.apache.felix.scr.impl.inject.BaseMethod.invokeMethod(BaseMethod.java:224)
at org.apache.felix.scr.impl.inject.BaseMethod.access$500(BaseMethod.java:39)
at org.apache.felix.scr.impl.inject.BaseMethod$Resolved.invoke(BaseMethod.java:617)
at org.apache.felix.scr.impl.inject.BaseMethod.invoke(BaseMethod.java:501)
at org.apache.felix.scr.impl.inject.ActivateMethod.invoke(ActivateMethod.java:302)
at org.apache.felix.scr.impl.inject.ActivateMethod.invoke(ActivateMethod.java:294)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:297)[31:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:108)[31:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:906)[31:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:879)[31:org.apache.felix.scr:2.0.6]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:823)[31:org.apache.felix.scr:2.0.6]

The message is actually much longer, but I had to cut it.
Does anyone know why?
Thank you very much