serviio 1.9 / ubuntu 16.04 / Ending the application (itself)

I installed serviio with this guide: http://wiki.serviio.org/doku.php?id=how ... buntu15-04
It used to work perfect In version 1.8 and java 8 ... then I had some problem with java ... I updated both so now I have:

2017-11-29 11:06:53,708 INFO [MediaServer] ------------------------------------------------------------------------
2017-11-29 11:06:53,733 INFO [MediaServer] Serviio DLNA media streaming server v 1.9 (rev. a39231b8b876)
2017-11-29 11:06:53,734 INFO [MediaServer] Petr Nejedly 2009-2017
2017-11-29 11:06:53,734 INFO [MediaServer] http://www.serviio.org
2017-11-29 11:06:53,734 INFO [MediaServer]
2017-11-29 11:06:53,734 INFO [MediaServer] Java 9.0.1-Oracle Corporation amd64
2017-11-29 11:06:53,734 INFO [MediaServer] OS Linux 4.10.0-40-lowlatency
2017-11-29 11:06:53,734 INFO [MediaServer] File encoding: UTF-8
2017-11-29 11:06:53,736 INFO [MediaServer] Headless mode enabled: true
2017-11-29 11:06:53,736 INFO [MediaServer] User: serviio
2017-11-29 11:06:53,736 INFO [MediaServer] User home dir: /home/serviio
2017-11-29 11:06:53,736 INFO [MediaServer] Temp dir: /tmp
2017-11-29 11:06:53,736 INFO [MediaServer] ---------------------------------------

Unfortunately after update seriio server starts but after a few seconds it ends itself ... and in a log file I found this:

2017-11-29 11:07:03,755 ERROR [MediaServer] An unexpected error occured. Ending the application. Message: javax.xml.soap.SOAPException
java.lang.NoClassDefFoundError: javax/xml/soap/SOAPException
at org.serviio.upnp.webserver.WebServer$RequestListenerThread.<init>(WebServer.java:122)
at org.serviio.upnp.webserver.WebServer.start(WebServer.java:76)
at org.serviio.MediaServer.startServer(MediaServer.java:207)
at org.serviio.MediaServer.main(MediaServer.java:158)
Caused by: java.lang.ClassNotFoundException: javax.xml.soap.SOAPException
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
... 4 more

Any ideas what is wrong .... ???

(other java applications for ex. Bubbleupnpserver works fine)

... solved ...

... installing and setting java 8 as deflaut (insted of 9) solved my problem for now ...