Adding debug for your reference
See below:
JQMIGRATE: Migrate is installed, version 1.4.0 core.js:7:542
State changed to INITIATING jsxc.js:183:10
i18next: languageChanged en jsxc.dep.js:48154:7728
i18next: initialized Object { debug: true, initImmediate: true, ns:
Array[1], defaultNS: Array[1], fallbackLng: Array[1], fallbackNS: false,
whitelist: false, nonExplicitWhitelist: false, load: “all”, preload: false,
19 more… } jsxc.dep.js:48154:7728
State changed to PREVCONFOUND jsxc.js:183:10
check master jsxc.js:183:10
undefined content.js:2:5
I am master. jsxc.js:183:10
State changed to ESTABLISHING jsxc.js:183:10
Try to attach jsxc.js:183:10
SID: 9747d4e5-14f9-4aaa-b2e9-bfdb8800d671 jsxc.js:183:10
ATTACHED: null jsxc.js:183:10
Discover muc service jsxc.js:183:10
UI State changed to INITIATING jsxc.js:183:10
discover http upload service jsxc.js:183:10
Send presence jsxc.js:165:13
Update file transfer icons for user@domain jsxc.js:183:10
webrtc.initWindow jsxc.js:183:10
Update icon user@domain jsxc.js:165:13
UI State changed to READY jsxc.js:183:10
DSA key loaded jsxc.js:183:10
State changed to READY jsxc.js:183:10
<body rid="233382209" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<body rid="233382210" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
XML Parsing Error: not well-formed
Location:
Line Number 1, Column 168: (unknown):1:168
onUserMediaSuccess jsxc.js:183:10
media ready for outgoing call jsxc.js:183:10
close dialog jsxc.js:183:10
i18next::translator: missingKey en translation No_video_signal
jsxc.dep.js:48154:7728
[Webrtc] Initiate call jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Changing session
state to: pending jsxc.js:165:13
onaddstream is deprecated! Use peerConnection.ontrack instead.
jsxc.dep.js:34333
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Discovered new ICE
candidate jsxc.js:165:13
<body rid="233382211" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Discovered new ICE
candidate jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: ICE end of
candidates jsxc.js:165:13
<
jsxc.js:1094:13
<body rid="233382212" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
<
jsxc.js:1094:13
<body rid="233382213" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
[JINGLE][log:debug] 8743c03a-4fba-4b68-b5b0-6c2db870f075: session-info
jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Outgoing session
is ringing jsxc.js:165:13
[Webrtc] ringing… jsxc.js:165:13
<body rid="233382214" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
<
jsxc.js:1094:13
<body rid="233382215" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
[JINGLE][log:debug] 8743c03a-4fba-4b68-b5b0-6c2db870f075: session-accept
jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Changing session
state to: active jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Stream added
jsxc.js:165:13
[Webrtc] Remote stream for session 8743c03a-4fba-4b68-b5b0-6c2db870f075
added. jsxc.js:165:13
[Webrtc] Use remote video device. jsxc.js:165:13
[Webrtc] No remote audio device jsxc.js:165:13
<body rid="233382216" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
[JINGLE][log:debug] 8743c03a-4fba-4b68-b5b0-6c2db870f075: transport-info
jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Changing
connection state to: connecting jsxc.js:165:13
connection state for 8743c03a-4fba-4b68-b5b0-6c2db870f075 connecting
jsxc.js:165:13
<body rid="233382217" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
<body rid="233382218" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
[JINGLE][log:debug] 8743c03a-4fba-4b68-b5b0-6c2db870f075:
session-terminate jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Terminating
session jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Stream removed
jsxc.js:165:13
[Webrtc] Remote stream for undefined removed. jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Changing
connection state to: disconnected jsxc.js:165:13
connection state for 8743c03a-4fba-4b68-b5b0-6c2db870f075 disconnected
jsxc.js:165:13
[JINGLE][log:info] 8743c03a-4fba-4b68-b5b0-6c2db870f075: Changing session
state to: ended jsxc.js:165:13
[Webrtc] call terminated user@domain/Name Chat failed-transport
jsxc.js:165:13
close dialog jsxc.js:183:10
i18next::translator: missingKey en translation
jingle_reason_failed-transport jingle_reason_failed-transport
jsxc.dep.js:48154:7728
RTCPeerConnection.getLocalStreams/getRemoteStreams are deprecated. Use
RTCPeerConnection.getSenders/getReceivers instead. jsxc.dep.js:14690:23
Invalid URI. Load of media resource failed. files
<body rid="233382219" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
jsxc.js:1094:13
[JINGLE][log:error] Unknown session jsxc.js:165:13
<body rid="233382220" xmlns="http://jabber.org/protocol/httpbind"
sid=“9747d4e5-14f9-4aaa-b2e9-bfdb8800d671”> jsxc.js:1097:13
<
Do you have any related entries in your XMPP server log or your host system
(e.g. nextcloud, sogo, …)? Seems not