Video Bridge not runing (Exceptions)

Hi,

it seems that the video bridge in my jitsi installation on vhost with debian 9 is not runing. When starting it manual by

root@server:/usr/share/jitsi-videobridge# ./jvb.sh --host=localhost --domain=xxx.yyy.zz --port=5347 --secret=vvvv

I am getting a number of exceptions:

Apr 22, 2020 7:54:27 AM org.jitsi.utils.logging.LoggerImpl log
SEVERE: host-unknown, host:localhost, port:5347
org.xmpp.component.ComponentException: host-unknown
at org.jivesoftware.whack.ExternalComponent.connect(ExternalComponent.java:243)
at org.jivesoftware.whack.ExternalComponentManager.addComponent(ExternalComponentManager.java:242)
at org.jivesoftware.whack.ExternalComponentManager.addComponent(ExternalComponentManager.java:222)
at org.jitsi.meet.ComponentMain.lambda$getConnectCallable$0(ComponentMain.java:285)
at org.jitsi.retry.RetryStrategy$TaskRunner.run(RetryStrategy.java:193)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
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)

Apr 22, 2020 7:54:32 AM org.jitsi.utils.logging2.LoggerImpl log
SEVERE: Health check failed in PT0.002S:
java.lang.Exception: No XMPP components
at org.jitsi.videobridge.health.Health.checkXmppConnection(Health.java:124)
at org.jitsi.videobridge.health.Health.performCheck(Health.java:203)
at org.jitsi.health.AbstractHealthCheckService.run(AbstractHealthCheckService.kt:144)
at org.jitsi.utils.concurrent.RecurringRunnableExecutor.run(RecurringRunnableExecutor.java:216)
at org.jitsi.utils.concurrent.RecurringRunnableExecutor.runInThread(RecurringRunnableExecutor.java:292)
at org.jitsi.utils.concurrent.RecurringRunnableExecutor.access$000(RecurringRunnableExecutor.java:36)
at org.jitsi.utils.concurrent.RecurringRunnableExecutor$1.run(RecurringRunnableExecutor.java:328)

Thanks for any help in advance.