Jitsi (self-hosted) does not work from Safari

Hi,

Users with Safari cannot connect to Jitsi (1.0.3729-1 Ubuntu Bionic):

jvb_1 | JVB 2020-03-25 14:17:00.701 WARNING: [1017] org.jitsi.videobridge.EndpointMessageTransport.log() SCTP connection with a9793b81 not ready yet.
jvb_1 | JVB 2020-03-25 14:17:00.701 WARNING: [1017] org.jitsi.videobridge.EndpointMessageTransport.log() No available transport channel, can’t send a message
jvb_1 | JVB 2020-03-25 14:17:00.701 INFO: [1017] org.jitsi.videobridge.Channel.log() CAT=stat transport_connected,conf_id=aad97cc73a373146,content=data,ch_id=924b619c6d7cfaab,endp_id=a9793b81
jvb_1 | JVB 2020-03-25 14:17:00.729 WARNING: [1031] org.jitsi.videobridge.EndpointMessageTransport.log() SCTP connection with a9793b81 not ready yet.
jvb_1 | JVB 2020-03-25 14:17:00.730 WARNING: [1031] org.jitsi.videobridge.EndpointMessageTransport.log() No available transport channel, can’t send a message
jvb_1 | JVB 2020-03-25 14:17:00.760 SEVERE: [1023] org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.log() Failed to accept a connection from a DTLS client!
jvb_1 | java.io.IOException: org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl is closed!
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl.assertNotClosed(DatagramTransportImpl.java:124)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl.send(DatagramTransportImpl.java:477)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSRecordLayer.sendRecord(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSRecordLayer.send(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake$RecordLayerBuffer.sendToRecordLayer(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.writeHandshakeFragment(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.writeMessage(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.resendOutboundFlight(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.receiveMessage(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSServerProtocol.serverHandshake(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSServerProtocol.accept(Unknown Source)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.runInConnectThread(DtlsPacketTransformer.java:1043)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.access$000(DtlsPacketTransformer.java:40)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer$1.run(DtlsPacketTransformer.java:1272)

jvb_1 | JVB 2020-03-25 14:16:29.923 SEVERE: [909] org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.log() Failed to accept a connection from a DTLS client!
jvb_1 | java.io.IOException: org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl is closed!
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl.assertNotClosed(DatagramTransportImpl.java:124)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl.send(DatagramTransportImpl.java:477)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSRecordLayer.sendRecord(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSRecordLayer.send(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake$RecordLayerBuffer.sendToRecordLayer(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.writeHandshakeFragment(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.writeMessage(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.resendOutboundFlight(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSReliableHandshake.receiveMessage(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSServerProtocol.serverHandshake(Unknown Source)
jvb_1 | at org.bouncycastle.crypto.tls.DTLSServerProtocol.accept(Unknown Source)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.runInConnectThread(DtlsPacketTransformer.java:1043)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.access$000(DtlsPacketTransformer.java:40)
jvb_1 | at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer$1.run(DtlsPacketTransformer.java:1272)

Any idea, what’s wrong?

Many thanks!