Firefox restarts meeting as soon as someone else is there with "Sorry something went wrong please wait X seconds"

Hi there, I am constantly kicked out of a meeting. When I am the first one there I can join the room but as soon as there is someone else I am getting an error message.

The console log is not very helpful but maybe someone has an idea:

            2020-04-24T07:41:09.582Z [features/base/devices] Device list updated:
            audioInput:
                    Sony Playstation Eye Multichannel[EcgF5lSzPpaol7V5rjTI/kYqN6COzT2643pTwMA45GI=]
                    Monitor of Built-in Audio Analog Stereo[957bmLfvjWeod3SGTLKnXGIKBkkeshyVsrrCK4Ntio0=]
                    Built-in Audio Analog Stereo[S+AzLXiXZR96NlfQ0TgT//KhXSvkbVBqOXEQl2Vlb0c=]
            audioOutput:

            videoInput:
                    Intel IPU3 CIO2[rQdR6/LF6EHr+lJUFHmNtmnTfI8WeRK3itEQdXNApUc=]
                    Intel IPU3 CIO2[rQdR6/LF6EHr+lJUFHmNtmnTfI8WeRK3itEQdXNApUc=]
                    Intel IPU3 CIO2[rQdR6/LF6EHr+lJUFHmNtmnTfI8WeRK3itEQdXNApUc=]
                    Intel IPU3 CIO2[rQdR6/LF6EHr+lJUFHmNtmnTfI8WeRK3itEQdXNApUc=]
                    ipu3-imgu[dLRMUjr5PZH/9CEH9lwL513wYRp0wIR2KB/uXNK3Yfc=]
                    ipu3-imgu[Wb8dvAihy2rJRxqK/GW+MAIYOJZYmZtoRW1b6Hcn6WM=]
                    ipu3-imgu[coL60tr6PWIsTjmIJHjMFUv7Miv6bs5H1TWq++HOmdM=]
                    ipu3-imgu[sOd4G/yFTUsss8fE1XxdYAZRDJxpu+OGjdsshTR/HYo=]
                    ipu3-imgu[2t1xkG3AgQV4ydi+NyfljTxKn0mxhzCKsgc8R5cHzJg=]
                    ipu3-imgu[dLRMUjr5PZH/9CEH9lwL513wYRp0wIR2KB/uXNK3Yfc=]
                    ipu3-imgu[Wb8dvAihy2rJRxqK/GW+MAIYOJZYmZtoRW1b6Hcn6WM=]
                    ipu3-imgu[coL60tr6PWIsTjmIJHjMFUv7Miv6bs5H1TWq++HOmdM=]
                    ipu3-imgu[sOd4G/yFTUsss8fE1XxdYAZRDJxpu+OGjdsshTR/HYo=]
                    ipu3-imgu[2t1xkG3AgQV4ydi+NyfljTxKn0mxhzCKsgc8R5cHzJg=]
                    USB Camera-B4.09.24.1[Qnf8AjHeyVyC8aYwjOxlS8cPvjm+VYGqu9oB+Eu6+Rc=] Logger.js:154:22
            2020-04-24T07:41:09.604Z [features/local-recording] <setMicDevice>:  Switch microphone to EcgF5lSzPpaol7V5rjTI/kYqN6COzT2643pTwMA45GI= Logger.js:154:22
            2020-04-24T07:41:09.739Z [modules/xmpp/strophe.jingle.js] <onJingle>:  on jingle session-initiate from myconference@conference.meet.jit.si/focus 
            <iq id="OGI2ZTljYTUtMGJiYi00MWJj…g9+Qnadp8Cx+2pN45dbOA==" to="8b6e9ca5-0bbb-41bc-b3a3-…cd@meet.jit.si/wYtSkj-9" from="myconference@conference.meet.jit.si/focus" type="set" xmlns="jabber:client">
            Logger.js:154:22
            2020-04-24T07:41:09.743Z [modules/xmpp/strophe.jingle.js] <onJingle>:  (TIME) received session-initiate:	 15723 Logger.js:154:22
            2020-04-24T07:41:09.747Z [modules/xmpp/strophe.jingle.js] <onJingle>:  Marking session from myconference@conference.meet.jit.si/focus as *not* P2P Logger.js:154:22
            SdpSimulcast: using 3 layers index.js:44:12
            2020-04-24T07:41:09.772Z [modules/RTC/TraceablePeerConnection.js] Create new TPC[1,p2p:false] Logger.js:154:22
            2020-04-24T07:41:09.781Z [modules/RTC/BridgeChannel.js] constructor() with wsUrl:"wss://meet-jit-si-eu-central-1a-s26-jvb-40-80-215.jitsi.net:443/colibri-ws/default-id/57dd772fee4adf77/8b6e9ca5?pwd=726ubn8darcvjkp3ek3svek01l" Logger.js:154:22
            2020-04-24T07:41:09.786Z [JitsiConference.js] <se.prototype._acceptJvbIncomingCall>:  Starting CallStats for JVB connection... Logger.js:154:22
            Quellübergreifende (Cross-Origin) Anfrage blockiert: Die Gleiche-Quelle-Regel verbietet das Lesen der externen Ressource auf https://api.amplitude.com/. (Grund: CORS-Anschlag schlug fehl).

            2020-04-24T07:41:09.932Z [modules/RTC/TraceablePeerConnection.js] <C.prototype.addTrack>:  add LocalTrack[1,audio] to: TPC[1,p2p:false] Logger.js:154:22
            2020-04-24T07:41:09.937Z [modules/RTC/TraceablePeerConnection.js] <C.prototype.addTrack>:  add LocalTrack[2,video] to: TPC[1,p2p:false] Logger.js:154:22
            2020-04-24T07:41:09.985Z [modules/xmpp/JingleSessionPC.js] <_responderRenegotiate>:  Renegotiate: setting remote description Logger.js:154:22
            Halt: There are no SSRC groups in the remote description. index.js:146:16
            Imploding SIM group: 3251552318 4097682715 2113887504 index.js:159:16
            [Amplitude] WARNING: Property key "reason" with invalid value type undefined, ignoring amplitude.js:2085:12
            2020-04-24T07:41:10.219Z [features/overlay] <componentDidMount>:  The conference will be reloaded after 18 seconds. Logger.js:154:22
            2020-04-24T07:41:10.275Z [modules/UI/videolayout/VideoLayout.js] <changeUserAvatar>:  Missed avatar update - no small video yet for local Logger.js:154:22
            2020-04-24T07:41:10.305Z [modules/UI/videolayout/VideoLayout.js] <removeParticipantContainer>:  Removing remote video: c372f932 Logger.js:154:22
            2020-04-24T07:41:10.307Z [modules/UI/videolayout/SmallVideo.js] <remove>:  Remove thumbnail c372f932 Logger.js:154:22
            2020-04-24T07:41:10.356Z [features/base/lastn] There is no active conference, not updating last N Logger.js:154:22
            2020-04-24T07:41:10.359Z [conference.js] <_onConferenceFailed>:  CONFERENCE FAILED: conference.offerAnswerFailed DOMException: "SIPCC Failed to parse SDP: SDP Parse Error on line 58:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 88:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 110:  Warning: Unrecognized attribute (ssrc-group) 
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            " Logger.js:154:22
            2020-04-24T07:41:10.381Z [modules/UI/videolayout/SmallVideo.js] <remove>:  Remove thumbnail 8b6e9ca5 Logger.js:154:22
            2020-04-24T07:41:10.399Z [modules/rttmonitor/rttmonitor.js] <stop>:  Stopping RttMonitor. Logger.js:154:22
            2020-04-24T07:41:10.401Z [modules/e2eping/e2eping.js] <stop>:  Stopping e2eping Logger.js:154:22
            2020-04-24T07:41:10.408Z [modules/xmpp/ChatRoom.js] <doLeave>:  do leave myconference@conference.meet.jit.si/8b6e9ca5 Logger.js:154:22
            2020-04-24T07:41:10.428Z [modules/xmpp/JingleSessionPC.js] <setOfferAnswerCycle/</<>:  Error renegotiating after setting new remote offer: OperationError: SIPCC Failed to parse SDP: SDP Parse Error on line 58:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 88:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 110:  Warning: Unrecognized attribute (ssrc-group) 
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            
            Object { media: (2) […], raw: "v=0\r\no=- 1587714069944 2 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=group:BUNDLE audio video\r\nm=audio 1 RTP/SAVPF 111 103 104 126\r\nc=IN IP4 0.0.0.0\r\na=rtcp:1 IN IP4 0.0.0.0\r\na=ice-ufrag:acehf1e6li43gb\r\na=ice-pwd:726ubn8darcvjkp3ek3svek01l\r\na=fingerprint:sha-256 93:69:3F:AB:82:9E:41:B9:2A:E1:2E:03:1E:69:76:FF:25:4A:CB:EB:9A:F5:29:7D:03:51:6C:C7:D1:03:45:A8\r\na=setup:actpass\r\na=sendrecv\r\na=mid:audio\r\na=rtcp-mux\r\na=rtpmap:111 opus/48000/2\r\na=fmtp:111 minptime=10; useinbandfec=1\r\na=rtcp-fb:111 transport-cc\r\na=rtpmap:103 ISAC/16000\r\na=rtpmap:104 ISAC/32000\r\na=rtpmap:126 telephone-event/8000\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=candidate:1 1 udp 2130706431 10.40.80.215 10000 typ host generation 0\r\na=candidate:2 1 udp 1694498815 130.61.105.86 10000 typ srflx raddr 10.40.80.215 rport 10000 generation 0\r\na=ssrc:3546175075 cname:mixed\r\na=ssrc:3546175075 label:mixedlabelaudio0\r\na=ssrc:3546175075 msid:mixedmslabel mixedlabelaudio0\r\na=ssrc:3546175075 mslabel:mixedmslabel\r\na=ssrc:428508833 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:428508833 msid:ece1dbd0-db77-4ac2-a7ea-50b9769ce512-3 335cf627-26e9-4296-8b81-29f25757574f-3\r\nm=video 1 RTP/SAVPF 100\r\nc=IN IP4 0.0.0.0\r\na=rtcp:1 IN IP4 0.0.0.0\r\na=ice-ufrag:acehf1e6li43gb\r\na=ice-pwd:726ubn8darcvjkp3ek3svek01l\r\na=fingerprint:sha-256 93:69:3F:AB:82:9E:41:B9:2A:E1:2E:03:1E:69:76:FF:25:4A:CB:EB:9A:F5:29:7D:03:51:6C:C7:D1:03:45:A8\r\na=setup:actpass\r\na=sendrecv\r\na=mid:video\r\na=rtcp-mux\r\na=rtpmap:100 VP8/90000\r\na=fmtp:100 x-google-start-bitrate=800\r\na=rtcp-fb:100 ccm fir\r\na=rtcp-fb:100 nack\r\na=rtcp-fb:100 nack pli\r\na=rtcp-fb:100 goog-remb\r\na=rtcp-fb:100 transport-cc\r\na=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\na=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=candidate:1 1 udp 2130706431 10.40.80.215 10000 typ host generation 0\r\na=candidate:2 1 udp 1694498815 130.61.105.86 10000 typ srflx raddr 10.40.80.215 rport 10000 generation 0\r\na=ssrc-group:FID 3251552318 3377718208\r\na=ssrc-group:FID 4097682715 3605485769\r\na=ssrc-group:FID 2113887504 2222571458\r\na=ssrc-group:SIM 3251552318 4097682715 2113887504\r\na=ssrc:2201308313 cname:mixed\r\na=ssrc:2201308313 label:mixedlabelvideo0\r\na=ssrc:2201308313 msid:mixedmslabel mixedlabelvideo0\r\na=ssrc:2201308313 mslabel:mixedmslabel\r\na=ssrc:3251552318 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:3251552318 msid:7b9b9b16-e389-4af4-9073-d50188972c2b-3 da944d68-35b7-4916-8c38-ef878a901bf2-3\r\na=ssrc:3377718208 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:3377718208 msid:7b9b9b16-e389-4af4-9073-d50188972c2b-3 da944d68-35b7-4916-8c38-ef878a901bf2-3\r\na=ssrc:4097682715 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:4097682715 msid:7b9b9b16-e389-4af4-9073-d50188972c2b-3 da944d68-35b7-4916-8c38-ef878a901bf2-3\r\na=ssrc:2113887504 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:2113887504 msid:7b9b9b16-e389-4af4-9073-d50188972c2b-3 da944d68-35b7-4916-8c38-ef878a901bf2-3\r\na=ssrc:3605485769 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:3605485769 msid:7b9b9b16-e389-4af4-9073-d50188972c2b-3 da944d68-35b7-4916-8c38-ef878a901bf2-3\r\na=ssrc:2222571458 cname:8O6pdlJLhBGUwKzU-3\r\na=ssrc:2222571458 msid:7b9b9b16-e389-4af4-9073-d50188972c2b-3 da944d68-35b7-4916-8c38-ef878a901bf2-3\r\n", session: "v=0\r\no=- 1587714069944 2 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=group:BUNDLE audio video\r\n" }
            Logger.js:154:22
            2020-04-24T07:41:10.433Z [JitsiMeetJS.js] <getGlobalOnErrorHandler>:  UnhandledError: null Script: null Line: null Column: null StackTrace:  DOMException: "SIPCC Failed to parse SDP: SDP Parse Error on line 58:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 88:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 110:  Warning: Unrecognized attribute (ssrc-group) 
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            " Logger.js:154:22
            2020-04-24T07:41:10.437Z [JitsiConference.js] <se.prototype._acceptJvbIncomingCall/<>:  Failed to accept incoming Jingle session DOMException: "SIPCC Failed to parse SDP: SDP Parse Error on line 58:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 88:  Warning: Invalid named events specified for fmtp attribute.
            SDP Parse Error on line 110:  Warning: Unrecognized attribute (ssrc-group) 
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            SDP Parse Error on line 55: No rid attribute for 'rid=1'
            " Logger.js:154:22
            2020-04-24T07:41:10.442Z [modules/RTC/TraceablePeerConnection.js] <C.prototype.close>:  Closing TPC[1,p2p:false]... Logger.js:154:22
            Firefox kann keine Verbindung zu dem Server unter wss://meet-jit-si-eu-central-1a-s26-jvb-40-80-215.jitsi.net/colibri-ws/default-id/57dd772fee4adf77/8b6e9ca5?pwd=726ubn8darcvjkp3ek3svek01l aufbauen. BridgeChannel.js:85:19
            2020-04-24T07:41:10.657Z [features/base/storage] <persistState>:  redux state persisted. 741e73e6f2848cade034544c22217f14 -> 574e79625b5e36fa9076f368c0b077a7 Logger.js:154:22
            2020-04-24T07:41:10.659Z [modules/UI/videolayout/VideoLayout.js] <changeUserAvatar>:  Missed avatar update - no small video yet for 8b6e9ca5 Logger.js:154:22
            2020-04-24T07:41:10.675Z [modules/UI/videolayout/LargeVideoManager.js] <scheduleLargeVideoUpdate/<>:  hover in local Logger.js:154:22
            2020-04-24T07:41:10.733Z [modules/UI/videolayout/VideoLayout.js] <changeUserAvatar>:  Missed avatar update - no small video yet for 8b6e9ca5 Logger.js:154:22
            Die Verbindung zu wss://meet-jit-si-eu-central-1a-s26-jvb-40-80-215.jitsi.net/colibri-ws/default-id/57dd772fee4adf77/8b6e9ca5?pwd=726ubn8darcvjkp3ek3svek01l wurde unterbrochen, während die Seite geladen wurde. BridgeChannel.js:85:19
            2020-04-24T07:41:10.824Z [modules/RTC/BridgeChannel.js] <_handleChannel/e.onclose>:  Channel closed by client Logger.js:154:22
            2020-04-24T07:41:10.929Z [modules/RTC/RTC.js] <removeRemoteTracks>:  Removed remote tracks for c372f932 count: 0 Logger.js:154:22
            2020-04-24T07:41:10.963Z [modules/UI/videolayout/VideoLayout.js] <removeParticipantContainer>:  No remote video for c372f932 Logger.js:154:22
            2020-04-24T07:41:10.965Z [conference.js] <_setupListeners/<>:  USER c372f932 LEFT: 
            Object { _jid: "myconference@conference.meet.jit.si/c372f932", _id: "c372f932", _conference: {…}, _displayName: undefined, _supportsDTMF: false, _tracks: [], _role: "moderator", _status: undefined, _hidden: false, _statsID: "Elmira-Qv0", … }
            Logger.js:154:22
            2020-04-24T07:41:10.974Z [JitsiConference.js] <se.prototype._maybeStartOrStopP2P>:  Auto P2P disabled Logger.js:154:22
            2020-04-24T07:41:10.976Z [modules/xmpp/moderator.js] <u.prototype.onMucMemberLeft>:  Someone left is it focus ? myconference@conference.meet.jit.si/c372f932 Logger.js:154:22
            2020-04-24T07:41:11.011Z [modules/xmpp/xmpp.js] <connectionHandler>:  (TIME) Strophe disconnecting:	 16992