Join call buttons disabled/greyed out

[JoelLinn]

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Steps to reproduce

1. Have a (video) call with other users or guests. No problem on first call.
2. Coming back some time later I found the call button is greyed out, even if the peer has the app (or web page) with the current conversation open.

Expected behaviour

One should be able to start a call.

Actual behaviour

Call button is greyed out / disabled. Sometimes for both sides, sometimes only for one (so one side can start the call and the other can join). Even have a case where a call is active but still not being able to join. (screenshot)

Talk app

Talk app version: 20.1.3

Custom Signaling server configured: no

Custom TURN server configured: yes

Custom STUN server configured: yes

Browser

Microphone available: yes

Camera available: yes

Operating system: Arch, Mac & iOS

Browser name: Chromium, Firefox & Safari

Browser version: NA

Browser log

I had a quick debug session and determined that currentConversationIsJoined == false is the reason for the disabled button.

Server configuration

Operating system: Ub 20.04 + Docker nextcloud:30.0-fpm

Web server: Nginx

Database: Maria

Nextcloud Version: 30.0.4
List of activated apps:

Enabled:
  - activity: 3.0.0
  - admin_audit: 1.20.0
  - app_api: 4.0.3
  - bruteforcesettings: 3.0.0
  - calendar: 5.0.9
  - checksum: 1.2.5
  - circles: 30.0.0
  - cloud_federation_api: 1.13.0
  - comments: 1.20.1
  - contacts: 6.1.3
  - contactsinteraction: 1.11.0
  - dashboard: 7.10.0
  - dav: 1.31.1
  - external: 5.5.2
  - facerecognition: 0.9.60
  - federatedfilesharing: 1.20.0
  - files: 2.2.0
  - files_downloadlimit: 3.0.0
  - files_pdfviewer: 3.0.0
  - files_reminders: 1.3.0
  - files_sharing: 1.22.0
  - files_trashbin: 1.20.1
  - files_versions: 1.23.0
  - firstrunwizard: 3.0.0
  - logreader: 3.0.0
  - lookup_server_connector: 1.18.0
  - memories: 7.4.1
  - nextcloud_announcements: 2.0.0
  - notes: 4.11.0
  - notifications: 3.0.0
  - oauth2: 1.18.1
  - password_policy: 2.0.0
  - photos: 3.0.2
  - piwik: 0.13.0
  - previewgenerator: 5.7.0
  - privacy: 2.0.0
  - provisioning_api: 1.20.0
  - recommendations: 3.0.0
  - related_resources: 1.5.0
  - serverinfo: 2.0.0
  - settings: 1.13.0
  - sharebymail: 1.20.0
  - spreed: 20.1.3
  - support: 2.0.0
  - survey_client: 2.0.0
  - systemtags: 1.20.0
  - text: 4.1.0
  - theming: 2.5.0
  - theming_customcss: 1.18.0
  - twofactor_backupcodes: 1.19.0
  - updatenotification: 1.20.0
  - user_status: 1.10.0
  - viewer: 3.0.0
  - weather_status: 1.10.0
  - webhook_listeners: 1.1.0-dev
  - workflowengine: 2.12.0

Nextcloud configuration:

{
    "system": {
        "facerecognition.external_model_url": "http:\/\/facerecognition:5000",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "filelocking.enabled": true,
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "xxxxxx"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "version": "30.0.4.1",
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/xxxx",
        "overwritehost": "xxxxx",
        "overwriteprotocol": "https",
        "dbtype": "mysql",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "mysql.utf8mb4": true,
        "installed": true,
        "maintenance": false,
        "trashbin_retention_obligation": "10, 60",
        "versions_retention_obligation": "10, 60",
        "preview_max_scale_factor": 1,
        "updater.release.channel": "stable",
        "upgrade.disable-web": true,
        "mail_smtpmode": "smtp",
        "mail_smtpsecure": "tls",
        "mail_smtpauthtype": "LOGIN",
        "mail_sendmailmode": "smtp",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "loglevel": 0,
        "app_install_overwrite": [
            "piwik",
            "checksum",
            "facerecognition"
        ],
        "default_phone_region": "DE",
        "profile.enabled": false,
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "maintenance_window_start": 2,
        "memories.db.triggers.fcu": true,
        "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/exiftool-amd64-glibc",
        "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-amd64",
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "memories.gis_type": 1,
        "enabledPreviewProviders": [
            "OC\\Preview\\Movie",
            "OC\\Preview\\HEIC",
            "OC\\Preview\\Image",
            "OC\\Preview\\TIFF"
        ]
    }
}

Server log (data/nextcloud.log)

Insert your server log here