When the camera permission is not authorized, an error is reported and the connection cannot be established

[PineSongCN]

Describe the bug

If the error message could be made more specific regarding the issue where the client is unable to establish a connection due to not having authorized camera permissions.

If it is a windows system, even if the browser allows camera permission, if a connection still cannot be established and an error is reported, it is the same as an error reported without authorization.

if there are any plans to deal with this issue that has been blocked by the Windows firewall?

Reproduction

import { Room, ScreenSharePresets, VideoPresets } from 'livekit-client';

const linkUpParams = {
  token: 'xxx',
  wsUrl: 'xxx',
};
const room = new Room({
  adaptiveStream: false,
  dynacast: true, 
  videoCaptureDefaults: {
    resolution: VideoPresets.h720.resolution,
  },

  disconnectOnPageLeave: true,
  audioOutput: {},
  publishDefaults: {
    videoSimulcastLayers: [VideoPresets.h720],
    videoCodec: 'h264',
    dtx: true,
    red: true,
    forceStereo: false,
    screenShareEncoding: ScreenSharePresets.h1080fps30.encoding,
    scalabilityMode: 'L3T3_KEY',
  },
});
console.log('livekit init success', room);

await room.prepareConnection(linkUpParams.wsUrl, linkUpParams.token);
console.log('livekit prepareConnection success', room);

await room.connect(linkUpParams.wsUrl, linkUpParams.token, {
  autoSubscribe: true,
  peerConnectionTimeout: 600_000,
  websocketTimeout: 600_000,
});
console.log('livekit connect success', room);

await room.localParticipant.setCameraEnabled(true);

Logs

> web
<img width="755" height="1155" alt="Image" src="https://github.com/user-attachments/assets/71ee6c2c-5744-4109-aad3-b5b631a291a3" />

>server

2025-11-14T06:54:00.790Z        INFO    livekit service/roommanager.go:405      starting RTC session    {"room": "C20251114Y7861L", "roomID": "RM_Q5jzdCcTuppX", "participant": "51483", "pID": "PA_LiXLA7jpX8vH", "remote": false, "room": "C20251114Y7861L", "nodeID": "ND_mBPN49vMGRvM", "numParticipants": 1, "participantInit": {"Identity": "51483", "Reconnect": false, "ReconnectReason": "RR_UNKNOWN", "AutoSubscribe": true, "Client": {"sdk": "JS", "version": "2.11.0", "protocol": 15, "os": "Windows", "osVersion": "10", "deviceModel": "Other", "browser": "Chrome", "browserVersion": "142.0.0"}, "Grants": {"Identity": "", "Kind": "", "Video": {"RoomCreate": false, "RoomList": false, "RoomRecord": false, "RoomAdmin": false, "RoomJoin": true, "Room": "C20251114Y7861L", "CanPublish": "not-set", "CanSubscribe": "not-set", "CanPublishData": "not-set", "CanPublishSources": ["camera", "microphone", "screen_share", "screen_share_audio", "unknown"], "CanUpdateOwnMetadata": "not-set", "IngressAdmin": false, "Hidden": false, "Recorder": false, "Agent": false, "CanSubscribeMetrics": "not-set"}, "SIP": {"Admin": false, "Call": false}, "RoomConfig": {}, "RoomPreset": ""}, "Region": "", "AdaptiveStream": false, "ID": "", "SubscriberAllowPause": "not-set", "DisableICELite": false, "CreateRoom": {"name": "C20251114Y7861L"}}}
2025-11-14T06:54:15.936Z        INFO    livekit rtc/participant.go:1033 participant closing     {"room": "C20251114Y7861L", "roomID": "RM_Q5jzdCcTuppX", "participant": "51483", "pID": "PA_LiXLA7jpX8vH", "remote": false, "sendLeave": false, "reason": "SIGNAL_SOURCE_CLOSE", "isExpectedToResume": false}
2025-11-14T06:54:15.936Z        INFO    livekit rtc/room.go:698 removing participant without connection {"room": "C20251114Y7861L", "roomID": "RM_Q5jzdCcTuppX", "participant": "51483", "pID": "PA_LiXLA7jpX8vH", "remote": false, "publisherCandidates": ["[local][trickle] udp4 host [192.168.128.2:7882](http://192.168.128.2:7882/) (resolved: [192.168.128.2:7882](http://192.168.128.2:7882/))", "[local][trickle] tcp4 host [192.168.128.2:7881](http://192.168.128.2:7881/) (resolved: [192.168.128.2:7881](http://192.168.128.2:7881/))", "[local][trickle] udp4 srflx [223.166.22.191:8419](http://223.166.22.191:8419/) related [0.0.0.0:60068](http://0.0.0.0:60068/) (resolved: [223.166.22.191:8419](http://223.166.22.191:8419/))", "[local][trickle] udp4 srflx [223.166.22.191:8441](http://223.166.22.191:8441/) related [0.0.0.0:54559](http://0.0.0.0:54559/) (resolved: [223.166.22.191:8441](http://223.166.22.191:8441/))", "[local][trickle] udp4 srflx [223.166.22.191:8746](http://223.166.22.191:8746/) related [0.0.0.0:49402](http://0.0.0.0:49402/) (resolved: [223.166.22.191:8746](http://223.166.22.191:8746/))", "[remote][trickle] udp4 host [192.168.161.71:53830](http://192.168.161.71:53830/)", "[remote][trickle] tcp4 host [192.168.161.71:9](http://192.168.161.71:9/)", "[remote][trickle] udp4 srflx 223.166.22....:8393  related [192.168.161.71:53830](http://192.168.161.71:53830/)", "[remote][trickle] udp4 srflx 223.166.22....:8478  related [192.168.161.71:53830](http://192.168.161.71:53830/)"], "subscriberCandidates": ["[local][trickle] udp4 host [192.168.128.2:7882](http://192.168.128.2:7882/) (resolved: [192.168.128.2:7882](http://192.168.128.2:7882/))", "[local][trickle] tcp4 host [192.168.128.2:7881](http://192.168.128.2:7881/) (resolved: [192.168.128.2:7881](http://192.168.128.2:7881/))", "[local][trickle] udp4 srflx [223.166.22.191:8314](http://223.166.22.191:8314/) related [0.0.0.0:45260](http://0.0.0.0:45260/) (resolved: [223.166.22.191:8314](http://223.166.22.191:8314/))", "[local][trickle] udp4 srflx [223.166.22.191:8312](http://223.166.22.191:8312/) related [0.0.0.0:59174](http://0.0.0.0:59174/) (resolved: [223.166.22.191:8312](http://223.166.22.191:8312/))", "[local][trickle] udp4 srflx [223.166.22.191:8742](http://223.166.22.191:8742/) related [0.0.0.0:37580](http://0.0.0.0:37580/) (resolved: [223.166.22.191:8742](http://223.166.22.191:8742/))", "[remote][trickle] udp4 host [192.168.161.71:53829](http://192.168.161.71:53829/)", "[remote][trickle] tcp4 host [192.168.161.71:9](http://192.168.161.71:9/)", "[remote][trickle] udp4 srflx 223.166.22....:8475  related [192.168.161.71:53829](http://192.168.161.71:53829/)", "[remote][trickle] udp4 srflx 223.166.22....:8389  related [192.168.161.71:53829](http://192.168.161.71:53829/)"], "connectionType": "unknown", "reason": "NONE"}
2025-11-14T06:54:15.986Z        ERROR   livekit service/signal.go:183   could not handle new participant        {"room": "C20251114Y7861L", "participant": "51483", "connID": "CO_vTbMeYiHWjWX", "error": "could not restart participant", "errorVerbose": "could not restart participant\[ngithub.com/livekit/livekit-server/pkg/service.(*RoomManager).StartSession\n\t/workspace/pkg/service/roommanager.go:395\ngithub.com/livekit/livekit-server/pkg/service.(*defaultSessionHandler).HandleSession\n\t/workspace/pkg/service/signal.go:114\ngithub.com/livekit/livekit-server/pkg/service.(*signalService).RelaySignal\n\t/workspace/pkg/service/signal.go:180\ngithub.com/livekit/psrpc/pkg/server](http://ngithub.com/livekit/livekit-server/pkg/service.(*RoomManager).StartSession/n/t/workspace/pkg/service/roommanager.go:395/ngithub.com/livekit/livekit-server/pkg/service.(*defaultSessionHandler).HandleSession/n/t/workspace/pkg/service/signal.go:114/ngithub.com/livekit/livekit-server/pkg/service.(*signalService).RelaySignal/n/t/workspace/pkg/service/signal.go:180/ngithub.com/livekit/psrpc/pkg/server).(*streamHandler[...]).handleOpenRequest\n\t/go/pkg/mod/[github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:202\ngithub.com/livekit/psrpc/pkg/server](http://github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:202/ngithub.com/livekit/psrpc/pkg/server).(*streamHandler[...]).handleRequest.func1\n\t/go/pkg/mod/[github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:141\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:1700](http://github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:141/nruntime.goexit/n/t/usr/local/go/src/runtime/asm_amd64.s:1700)"}
[github.com/livekit/livekit-server/pkg/service.(*signalService).RelaySignal](http://github.com/livekit/livekit-server/pkg/service.(*signalService).RelaySignal)
        /workspace/pkg/service/signal.go:183
[github.com/livekit/psrpc/pkg/server](http://github.com/livekit/psrpc/pkg/server).(*streamHandler[...]).handleOpenRequest
        /go/pkg/mod/[github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:202](http://github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:202)
[github.com/livekit/psrpc/pkg/server](http://github.com/livekit/psrpc/pkg/server).(*streamHandler[...]).handleRequest.func1
        /go/pkg/mod/[github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:141](http://github.com/livekit/psrpc@v0.6.1-0.20241018124827-1efff3d113a8/pkg/server/stream.go:141)
2025-11-14T06:54:16.410Z        INFO    livekit service/roommanager.go:405      starting RTC session    {"room": "C20251114Y7861L", "roomID": "RM_Q5jzdCcTuppX", "participant": "51483", "pID": "PA_CrbFJPwuMkzC", "remote": false, "room": "C20251114Y7861L", "nodeID": "ND_mBPN49vMGRvM", "numParticipants": 1, "participantInit": {"Identity": "51483", "Reconnect": false, "ReconnectReason": "RR_UNKNOWN", "AutoSubscribe": true, "Client": {"sdk": "JS", "version": "2.11.0", "protocol": 15, "os": "Windows", "osVersion": "10", "deviceModel": "Other", "browser": "Chrome", "browserVersion": "142.0.0"}, "Grants": {"Identity": "", "Kind": "", "Video": {"RoomCreate": false, "RoomList": false, "RoomRecord": false, "RoomAdmin": false, "RoomJoin": true, "Room": "C20251114Y7861L", "CanPublish": "not-set", "CanSubscribe": "not-set", "CanPublishData": "not-set", "CanPublishSources": ["camera", "microphone", "screen_share", "screen_share_audio", "unknown"], "CanUpdateOwnMetadata": "not-set", "IngressAdmin": false, "Hidden": false, "Recorder": false, "Agent": false, "CanSubscribeMetrics": "not-set"}, "SIP": {}, "RoomConfig": {}, "RoomPreset": ""}, "Region": "", "AdaptiveStream": false, "ID": "", "SubscriberAllowPause": "not-set", "DisableICELite": false, "CreateRoom": {"name": "C20251114Y7861L"}}}
2025-11-14T06:54:31.591Z        INFO    livekit rtc/participant.go:1033 participant closing     {"room": "C20251114Y7861L", "roomID": "RM_Q5jzdCcTuppX", "participant": "51483", "pID": "PA_CrbFJPwuMkzC", "remote": false, "sendLeave": false, "reason": "SIGNAL_SOURCE_CLOSE", "isExpectedToResume": false}
2025-11-14T06:54:31.591Z        INFO    livekit rtc/room.go:698 removing participant without connection {"room": "C20251114Y7861L", "roomID": "RM_Q5jzdCcTuppX", "participant": "51483", "pID": "PA_CrbFJPwuMkzC", "remote": false, "publisherCandidates": ["[local][trickle] udp4 host [192.168.128.2:7882](http://192.168.128.2:7882/) (resolved: [192.168.128.2:7882](http://192.168.128.2:7882/))", "[local][trickle] tcp4 host [192.168.128.2:7881](http://192.168.128.2:7881/) (resolved: [192.168.128.2:7881](http://192.168.128.2:7881/))", "[local][trickle] udp4 srflx [223.166.22.191:8967](http://223.166.22.191:8967/) related [0.0.0.0:42146](http://0.0.0.0:42146/) (resolved: [223.166.22.191:8967](http://223.166.22.191:8967/))", "[local][trickle] udp4 srflx [223.166.22.191:8961](http://223.166.22.191:8961/) related [0.0.0.0:57239](http://0.0.0.0:57239/) (resolved: [223.166.22.191:8961](http://223.166.22.191:8961/))", "[local][trickle] udp4 srflx [223.166.22.191:8942](http://223.166.22.191:8942/) related [0.0.0.0:47513](http://0.0.0.0:47513/) (resolved: [223.166.22.191:8942](http://223.166.22.191:8942/))", "[remote][trickle] udp4 host [192.168.161.71:52101](http://192.168.161.71:52101/)", "[remote][trickle] tcp4 host [192.168.161.71:9](http://192.168.161.71:9/)", "[remote][trickle] udp4 srflx 223.166.22....:8878  related [192.168.161.71:52101](http://192.168.161.71:52101/)", "[remote][trickle] udp4 srflx 223.166.22....:8868  related [192.168.161.71:52101](http://192.168.161.71:52101/)"], "subscriberCandidates": ["[local][trickle] udp4 host [192.168.128.2:7882](http://192.168.128.2:7882/) (resolved: [192.168.128.2:7882](http://192.168.128.2:7882/))", "[local][trickle] tcp4 host [192.168.128.2:7881](http://192.168.128.2:7881/) (resolved: [192.168.128.2:7881](http://192.168.128.2:7881/))", "[local][trickle] udp4 srflx [223.166.22.191:8821](http://223.166.22.191:8821/) related [0.0.0.0:54240](http://0.0.0.0:54240/) (resolved: [223.166.22.191:8821](http://223.166.22.191:8821/))", "[local][trickle] udp4 srflx [223.166.22.191:8835](http://223.166.22.191:8835/) related [0.0.0.0:54212](http://0.0.0.0:54212/) (resolved: [223.166.22.191:8835](http://223.166.22.191:8835/))", "[local][trickle] udp4 srflx [223.166.22.191:8836](http://223.166.22.191:8836/) related [0.0.0.0:54007](http://0.0.0.0:54007/) (resolved: [223.166.22.191:8836](http://223.166.22.191:8836/))", "[remote][trickle] udp4 host [192.168.161.71:52100](http://192.168.161.71:52100/)", "[remote][trickle] tcp4 host [192.168.161.71:9](http://192.168.161.71:9/)", "[remote][trickle] udp4 srflx 223.166.22....:7714  related [192.168.161.71:52100](http://192.168.161.71:52100/)", "[remote][trickle] udp4 srflx 223.166.22....:8854  related [192.168.161.71:52100](http://192.168.161.71:52100/)"], "connectionType": "unknown", "reason": "NONE"}

System Info

**System**
- windows 11

**Browswer**
- Chrome/Edge

**Server**
- Version: 1.8.2
- Environment: dev
- any other information about your deployment setup

**Client**
- SDK: js
- Version: 2.9.2

Severity

blocking all usage of LiveKit

Additional Information

No response

[lukasIO]

thanks for the report. Connection establishment is expected to succeed.
The call to await room.localParticipant.setCameraEnabled(true); is expected to fail with missing permissons.

Could you please post the client side logs with setLogLevel('debug') in the top of your example?

[PineSongCN]

thanks for the report. Connection establishment is expected to succeed. The call to await room.localParticipant.setCameraEnabled(true); is expected to fail with missing permissons.

Could you please post the client side logs with setLogLevel('debug') in the top of your example?

How to save the logs?

[lukasIO]

in chrome right click into the developer tools console and click "save as"

[PineSongCN]

in chrome right click into the developer tools console and click "save as"

livekit.log

[lukasIO]

thanks. The server is sending down a leave request, before the connection establishes. The reason for this is unclear (it looks like a STATE_MISMATCH, but it's unclear why that would be happening).

However this should be unrelated to any camera permissions.
Are you saying the connection works without problems if the camera permissions are granted?

[PineSongCN]

On the Apple system, allowing camera permissions will not result in this error

On the windows system, recently (the exact time is unknown), in addition to camera permissions, it is also necessary to turn off the firewall; otherwise, it will be blocked by the firewall (?) Then an error was reported.

[PineSongCN]

thanks. The server is sending down a leave request, before the connection establishes. The reason for this is unclear (it looks like a STATE_MISMATCH, but it's unclear why that would be happening).

However this should be unrelated to any camera permissions. Are you saying the connection works without problems if the camera permissions are granted?

On the Apple system, allowing camera permissions will not result in this error

On the windows system, recently (the exact time is unknown), in addition to camera permissions, it is also necessary to turn off the firewall; otherwise, it will be blocked by the firewall (?) Then an error was reported.