Jicofo unable to find valid certification path to requested target

Jicofo 2021-01-07 17:53:55.721 SCHWERWIEGEND: [19] org.jitsi.impl.protocol.xmpp.XmppProtocolProvider.log() Failed to connect/login: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
org.jivesoftware.smack.SmackException: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPConnection.java:1076)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$300(XMPPTCPConnection.java:1000)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnection.java:1016)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at java.base/sun.security.ssl.Alerts.getSSLException(Alerts.java:198)
at java.base/sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1969)
at java.base/sun.security.ssl.Handshaker.fatalSE(Handshaker.java:318)
at java.base/sun.security.ssl.Handshaker.fatalSE(Handshaker.java:312)
at java.base/sun.security.ssl.ClientHandshaker.checkServerCerts(ClientHandshaker.java:1846)
at java.base/sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1655)
at java.base/sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:260)
at java.base/sun.security.ssl.Handshaker.processLoop(Handshaker.java:1086)
at java.base/sun.security.ssl.Handshaker.processRecord(Handshaker.java:1020)
at java.base/sun.security.ssl.SSLSocketImpl.processInputRecord(SSLSocketImpl.java:1137)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1074)
at java.base/sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
at java.base/sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1402)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1429)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.proceedTLSReceived(XMPPTCPConnection.java:810)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.access$1200(XMPPTCPConnection.java:151)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPConnection.java:1071)

As far as I can see the crt File for auth.Domain.crt ist there and the secret for user focus are te same in jicofo and Prosody.
How can I make it work?
Thanks,

Try running this command:

update-ca-certificates -f

Hab ich gemacht.
Und danach sudo service prosody restart und sudo service jicofo restart.

Jicofo 2021-01-08 00:08:26.022 SCHWERWIEGEND: [93] org.jitsi.impl.protocol.xmpp.XmppProtocolProvider.log() Failed to connect/login: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Jicofo 2021-01-08 00:08:29.440 SCHWERWIEGEND: [36] org.jitsi.jicofo.xmpp.FocusComponent.log() not-authorized, host:localhost, port:5347

Ich habe jetzt die Certificatspr├╝fung ausgeschaltet, erhalte aber immer noch folgende Meldung.

Jicofo 2021-01-08 22:07:19.390 SCHWERWIEGEND: [38] org.jitsi.jicofo.xmpp.FocusComponent.log() java.net.ConnectException: Verbindungsaufbau abgelehnt (Connection refused), host:jpruehmann.dn
shome.de, port:5347