java.lang.Exception: No XMPP components jvb.log

I followed the manual installation steps on the official website. There was no error in the installation process and the boot was normal.However, when the browser starts a meeting, there is no image information and the camera is allowed to be enabled.View JVB log, Java.lang. Exception: No XMPP Components.
JVB 2020-08-27 14:39:26.346 SEVERE: [16] org.jitsi.videobridge.health.Health.log() Health check failed in 0ms:
java.lang.Exception: No XMPP components
at org.jitsi.videobridge.health.Health.checkXmppConnection(Health.java:269)
at org.jitsi.videobridge.health.Health.doCheck(Health.java:225)
at org.jitsi.videobridge.health.Health.doRun(Health.java:495)
at org.jitsi.utils.concurrent.PeriodicRunnableWithObject.run(PeriodicRunnableWithObject.java:89)
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)
JVB 2020-08-27 14:39:26.529 SEVERE: [31] org.jitsi.meet.ComponentMain.call().299 java.net.ConnectException: Connection refused (Connection refused), host:localhost, port:5275
org.xmpp.component.ComponentException: java.net.ConnectException: Connection refused (Connection refused)
at org.jivesoftware.whack.ExternalComponent.connect(ExternalComponent.java:296)
at org.jivesoftware.whack.ExternalComponentManager.addComponent(ExternalComponentManager.java:242)
at org.jivesoftware.whack.ExternalComponentManager.addComponent(ExternalComponentManager.java:222)
at org.jitsi.meet.ComponentMain$3.call(ComponentMain.java:291)
at org.jitsi.meet.ComponentMain$3.call(ComponentMain.java:276)
at org.jitsi.retry.RetryStrategy$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)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:607)
at org.jivesoftware.whack.ExternalComponent.connect(ExternalComponent.java:174)
… 12 more