The Basics
- Nextcloud Server version (e.g., 29.x.x):
- Nextcloud Hub 26 Winter (33.0.7)
- Operating system and version (e.g., Ubuntu 24.04):
- Ubuntu 24.04.4 LTS
- Web server and version (e.g, Apache 2.4.25):
- Apache/2.4.68 (Unix)
- Reverse proxy and version _(e.g. nginx 1.27.2)
- None (self-hosted, no separate reverse proxy)
- PHP version (e.g, 8.3):
- 8.3.33
- Is this the first time you’ve seen this error? (Yes / No)
- yes
- When did this problem seem to first start?
- after usage of of the same whiteboard with multiple users, at the same time
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
- no
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
- no
Summary of the issue you are facing:
When using a whiteboard some pictures do not load, there is a placeholder shown instead. This happens with images uploaded from a device and pictures copied from google, WhatsApp. etc. The size of the images don’t seem to have an affect on this. I have replicated this issue on two separate and independent Nextcloud-AIO instances. (Each instance has been setup by different people, making misconfiguration seem unlikely.)
Steps to replicate it :
-
Create a whiteboard
-
Open the whiteboard with two different accounts. (Or create a public share-link for the whiteboard and open it with another browser / private window)
-
Start pasting pictures into the whiteboards using both the different accounts. Keep dev-tools open in one browser-window, you should start seeing errors.
Log entries
Nextcloud
nextcloud.log
no logs relevant logs from nextcloud.log while reproducing the issue
Web Browser
logger.ts:41 [Sync] Local sync failed: DataCloneError: Failed to execute 'postMessage' on 'Worker': async(e,t,n,a)=>{let i;try{i=await uN()}catch(r){return r.name==="AbortError"||r.name==="NotAllowedError"?!1:(c...<omitted>...}} could not be cloned.
at useSync.ts:139:11
at useSync.ts:429:3
at Object.onChange (App.tsx:454:3)
(anonymous) @ logger.ts:41
Web server / Reverse Proxy
Apache/nginx/system log in /var/log/____:
no relevant logs found
Configuration
Nextcloud
occ config:list system
{
"system": {
"one-click-instance": true,
"one-click-instance.user-limit": 100,
"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
}
],
"check_data_directory_permissions": false,
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"password": "***REMOVED SENSITIVE VALUE***",
"port": 6379,
"timeout": 3,
"read_timeout": 10
},
"overwritehost": "cloud.waelchliplan.ch",
"overwriteprotocol": "https",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"localhost",
"cloud.waelchliplan.ch"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "pgsql",
"version": "33.0.7.1",
"overwrite.cli.url": "https:\/\/cloud.waelchliplan.ch\/",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"instanceid": "***REMOVED SENSITIVE VALUE***",
"maintenance": false,
"updatechecker": false,
"loglevel": 2,
"log_type": "file",
"logfile": "\/var\/www\/html\/data\/nextcloud.log",
"log_rotate_size": 10485760,
"log.condition": {
"apps": [
"admin_audit"
]
},
"preview_max_x": 2048,
"preview_max_y": 2048,
"jpeg_quality": 60,
"enabledPreviewProviders": {
"1": "OC\\Preview\\Image",
"2": "OC\\Preview\\MarkDown",
"3": "OC\\Preview\\MP3",
"4": "OC\\Preview\\TXT",
"5": "OC\\Preview\\OpenDocument",
"6": "OC\\Preview\\Movie",
"7": "OC\\Preview\\Krita",
"0": "OC\\Preview\\Imaginary",
"23": "OC\\Preview\\ImaginaryPDF"
},
"enable_previews": true,
"upgrade.disable-web": true,
"mail_smtpmode": "smtp",
"trashbin_retention_obligation": "auto, 30",
"versions_retention_obligation": "auto, 30",
"activity_expire_days": 30,
"simpleSignUpLink.shown": false,
"share_folder": "\/Shared",
"one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
"upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
"updatedirectory": "\/nc-updater",
"maintenance_window_start": 100,
"allow_local_remote_servers": true,
"davstorage.request_timeout": 3600,
"documentation_url.server_logs": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/5425",
"htaccess.RewriteBase": "\/",
"dbpersistent": false,
"auth.bruteforce.protection.enabled": true,
"ratelimit.protection.enabled": true,
"files_external_allow_create_new_local": true,
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
"preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
"forbidden_filename_characters": [
"\\",
"\/"
],
"forbidden_filename_extensions": [
".filepart",
".part"
],
"log_type_audit": "file",
"logfile_audit": "\/var\/www\/html\/data\/audit.log",
"twofactor_enforced": "true",
"twofactor_enforced_groups": [
"WaelchliPlanTeam",
"admin",
"WP_IT"
],
"twofactor_enforced_excluded_groups": [],
"serverid": 445,
"app_install_overwrite": [],
"update_channel": "stable",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpauth": true,
"mail_smtpport": "587",
"mail_sendmailmode": "smtp",
"mail_smtpstreamoptions": {
"ssl": {
"allow_self_signed": false,
"verify_peer": true,
"verify_peer_name": true
}
},
"DOMAIN": "cloud.waelchliplan.ch",
"AIO_VERSION": "v13.5.0"
}
}
wael
Apps
The output of occ app:list (if possible).
Enabled:
- activity: 6.0.0
- admin_audit: 1.23.0
- admincockpit: 1.3.5
- app_api: 33.0.0
- assistant: 3.5.0
- audioplayer: 3.9.0
- bruteforcesettings: 6.0.0
- calendar: 6.5.3
- circles: 33.0.0
- cloud_federation_api: 1.17.0
- command_bot: 1.3.0
- comments: 1.23.0
- contacts: 8.7.6
- contactsinteraction: 1.14.1
- context_chat: 5.4.0
- dashboard: 7.13.0
- dav: 1.36.0
- deck: 1.17.4
- encryption: 2.21.0
- federatedfilesharing: 1.23.0
- federation: 1.23.0
- files: 2.5.0
- files_3dmodelviewer: 0.0.16
- files_accesscontrol: 4.0.1
- files_antivirus: 6.4.0
- files_automatedtagging: 4.0.0
- files_downloadlimit: 5.1.0
- files_external: 1.25.1
- files_fulltextsearch: 33.0.0
- files_pdfviewer: 6.0.0
- files_reminders: 1.6.0
- files_sharing: 1.25.2
- files_trashbin: 1.23.0
- files_versions: 1.26.0
- firstrunwizard: 6.0.0
- flow_notifications: 4.0.0
- forms: 5.3.5
- fulltextsearch: 33.0.0
- fulltextsearch_elasticsearch: 33.0.0
- groupfolders: 21.0.15
- integration_openai: 4.5.2
- keeweb: 0.6.24
- libresign: 13.3.0
- logreader: 6.0.0
- lookup_server_connector: 1.21.0
- mail: 5.10.13
- nextcloud-aio: 0.8.0
- nextcloud_announcements: 5.0.0
- notes: 6.0.2
- notifications: 6.0.0
- notify_push: 1.4.0
- oauth2: 1.21.0
- password_policy: 5.0.0
- photos: 6.0.0
- polls: 9.1.4
- privacy: 5.0.0
- profile: 1.2.0
- provisioning_api: 1.23.0
- recommendations: 6.0.0
- related_resources: 4.0.0
- richdocuments: 10.3.0
- serverinfo: 5.0.0
- settings: 1.16.0
- sharebymail: 1.23.0
- spreed: 23.0.10
- support: 5.0.0
- survey_client: 5.0.0
- systemtags: 1.23.0
- tables: 2.2.2
- talk_matterbridge: 1.34.1026000
- tasks: 0.18.1
- teamhub: 4.7.1
- text: 7.0.1
- theming: 2.8.0
- thesearchpage: 2.4.5
- twofactor_admin: 4.12.0
- twofactor_backupcodes: 1.22.0
- twofactor_nextcloud_notification: 7.0.0
- twofactor_totp: 15.0.0
- updatenotification: 1.23.0
- user_status: 1.13.0
- viewer: 6.0.0
- weather_status: 1.13.0
- webhook_listeners: 1.5.0
- whiteboard: 1.5.9
- workflow_ocr: 1.33.1
- workflow_script: 4.0.1
- workflowengine: 2.15.0
Disabled:
- files_fulltextsearch_metadata: 0.1.1 (installed 0.1.1)
- files_linkeditor: 1.1.26 (installed 1.1.26)
- files_scripts: 5.0.1 (installed 5.0.1)
- linkboard: 1.11.1 (installed 1.11.1)
- suspicious_login: 11.0.0
- user_ldap: 1.24.0
Any help is appreciated !
Thanks in advance