Conference Fails with XMPP error

I can not setup a Jitsi conference after fresh installation. I get the following log files. XMPP error. Any help?

jicofo.log

Jicofo 2021-07-04 19:54:18.631 INFO: [178] ConferenceIqHandler.handleConferenceIq#56: Focus request for room: houseaffairdj@conference.meet.houseaffair.de
Jicofo 2021-07-04 19:54:18.631 INFO: [178] [room=houseaffairdj@conference.meet.houseaffair.de] JitsiMeetConferenceImpl.#251: Created new conference, roomJid=houseaffairdj@conference.meet.houseaffair.de
Jicofo 2021-07-04 19:54:18.632 INFO: [178] [room=houseaffairdj@conference.meet.houseaffair.de] JitsiMeetConferenceImpl.joinTheRoom#433: Joining houseaffairdj@conference.meet.houseaffair.de
Jicofo 2021-07-04 19:54:18.633 SEVERE: [178] [room=] ChatRoomImpl.setPresenceExtension#585: No presence packet obtained yet
Jicofo 2021-07-04 19:54:18.634 INFO: [178] [room=houseaffairdj@conference.meet.houseaffair.de] JitsiMeetConferenceImpl.stop#410: Stopped.
Jicofo 2021-07-04 19:54:18.634 WARNING: [178] FocusManager.conferenceRequest#229: Exception while trying to start the conference
org.jivesoftware.smack.XMPPException$XMPPErrorException: XMPP error reply received from conference.meet.houseaffair.de: XMPPError: remote-server-not-found - cancel. Generated by auth.meet.houseaffair.de

prosody log

Jul 04 19:54:17 mod_bosh info New BOSH session, assigned it sid ‘7a05faf9-953f-4c4e-9d4c-4538921d9e58’
Jul 04 19:54:17 bosh7a05faf9-953f-4c4e-9d4c-4538921d9e58 info Authenticated as 8grb0dkita5dwqfb@meet.houseaffair.de
Jul 04 19:54:18 s2sout55999fa8dd50 info Sending error replies for 1 queued stanzas because of failed outgoing connection to conference.meet.houseaffair.de
Jul 04 19:54:18 mod_s2s warn Connection to conference.meet.houseaffair.de failed already, destroying session…

jvb.log
JVB 2021-07-04 19:54:07.008 INFO: [25] VideobridgeExpireThread.expire#140: Running expire()
JVB 2021-07-04 19:54:07.044 INFO: [26] HealthChecker.run#171: Performed a successful health check in PT0S. Sticky failure: false
JVB 2021-07-04 19:54:17.044 INFO: [26] HealthChecker.run#171: Performed a successful health check in PT0S. Sticky failure: false
JVB 2021-07-04 19:54:27.044 INFO: [26] HealthChecker.run#171: Performed a successful health check in PT0S. Sticky failure: false
JVB 2021-07-04 19:54:37.043 INFO: [26] HealthChecker.run#171: Performed a successful health check in PT0S. Sticky failure: false
JVB 2021-07-04 19:54:47.043 INFO: [26] HealthChecker.run#171: Performed a successful health check in PT0S. Sticky failure: false
JVB 2021-07-04 19:54:57.044 INFO: [26] HealthChecker.run#171: Performed a successful health check in PT0S. Sticky failure: false