pax-web-undertow problems under Windows

2017-08-07 13:21:06,599 | ERROR | eb-config-2-thread-1 | o.o.p.w.s.i.Activator            | 213 - org.ops4j.pax.web.pax-web-runtime - 6.0.6 | Unable to start pax web server: Exception while starting Undertow
java.lang.RuntimeException: Exception while starting Undertow
	at org.ops4j.pax.web.service.undertow.internal.ServerControllerImpl.doStart(ServerControllerImpl.java:238) ~[?:?]
	at org.ops4j.pax.web.service.undertow.internal.ServerControllerImpl.start(ServerControllerImpl.java:118) ~[?:?]
	at org.ops4j.pax.web.service.internal.Activator.updateController(Activator.java:375) ~[?:?]
	at org.ops4j.pax.web.service.internal.Activator.lambda$scheduleUpdateFactory$2(Activator.java:291) ~[?:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
	at java.lang.Thread.run(Thread.java:748) [?:?]
Caused by: java.net.UnknownHostException: C
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) ~[?:?]
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[?:?]
	at java.net.Socket.connect(Socket.java:589) ~[?:?]
	at java.net.Socket.connect(Socket.java:538) ~[?:?]
	at sun.net.ftp.impl.FtpClient.doConnect(FtpClient.java:964) ~[?:?]
	at sun.net.ftp.impl.FtpClient.tryConnect(FtpClient.java:924) ~[?:?]
	at sun.net.ftp.impl.FtpClient.connect(FtpClient.java:1019) ~[?:?]
	at sun.net.ftp.impl.FtpClient.connect(FtpClient.java:1005) ~[?:?]
	at sun.net.www.protocol.ftp.FtpURLConnection.connect(FtpURLConnection.java:294) ~[?:?]
	at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:400) ~[?:?]
	at java.net.URL.openStream(URL.java:1045) ~[?:?]
	at org.ops4j.pax.web.service.undertow.internal.ServerControllerImpl.doStart(ServerControllerImpl.java:219) ~[?:?]
	... 8 more