Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
- most of office issues are handled in Collabora integration guide
- Official documentation (searchable and regularly updated)
- How to topics and FAQs
- Forum search
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
31.0.5.1
- Operating system and version (e.g., Ubuntu 24.04):
24.04.2 LTS
- Web server and version (e.g, Apache 2.4.25):
nginx 1.28.0
- Reverse proxy and version _(e.g. nginx 1.27.2)
nginx 1.28.0
- PHP version (e.g, 8.3):
8.3.6
- Is this the first time you’ve seen this error? (Yes / No):
Yes
- When did this problem seem to first start?
After upgrading richdocuments and/or NextCloud
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
Bare Metal
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
[in short : after upgrading ( both nextcloud and apps ) , I get error when I access any documents handled by RIchdocuments App. Everything else seems to be working fine.
whenever I click on a document ( docx, odt, xlsx, …) I get an error message saying
Failed to establish socket connection or socket connection closed unexpectedly. The reverse proxy might be misconfigured, please contact the administrator. For more info on proxy configuration please checkout Proxy settings — SDK https://sdk.collaboraonline.com/ documentation]
Steps to replicate it (hint: details matter!):
- Just click on any document handled in richdocuments ( e.g. test.docx )
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
I don't see any entries in the Nextcloud log. Maybe because the problem occurs in collabora
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
this is from collabora-access.log
192.168.10.16 - - [18/May/2025:22:48:17 +0000] "GET /cool/https%3A%2F%2Fnextcloud.middelf.art%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F467970_ocaqw24ymq8c%3Faccess_token%3D4qtMrtnd6CD0je32rgqzzr4YdHCblgGk%26access_token_ttl%3D0/ws?WOPISrc=https%3A%2F%2Fnextcloud.middelf.art%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F467970_ocaqw24ymq8c&compat=/ws HTTP/1.1" 403 0 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0"
192.168.10.16 - - [18/May/2025:22:48:17 +0000] "GET /cool/https%3A%2F%2Fnextcloud.middelf.art%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F467970_ocaqw24ymq8c%3Faccess_token%3D4qtMrtnd6CD0je32rgqzzr4YdHCblgGk%26access_token_ttl%3D0%26permission%3Dedit/ws?WOPISrc=https%3A%2F%2Fnextcloud.middelf.art%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F467970_ocaqw24ymq8c&compat=/ws HTTP/1.1" 403 0 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0"
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
occ config:list system
{
"system": {
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"nextcloud.middelf.art"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "pgsql",
"version": "31.0.5.1",
"overwrite.cli.url": "https:\/\/nextcloud.middelf.art",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"htaccess_RewriteBase": "\/",
"default_phone_region": "DA",
"memcache.local": "\\OC\\Memcache\\Redis",
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 0
},
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"maintenance": false,
"theme": "",
"loglevel": 2,
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "587",
"mail_smtpauth": 1,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"twofactor_enforced": "false",
"twofactor_enforced_groups": [
"users"
],
"twofactor_enforced_excluded_groups": [
"admin"
],
"memories.exiftool": "\/var\/www\/nextcloud\/apps\/memories\/bin-ext\/exiftool-amd64-glibc",
"memories.vod.path": "\/var\/www\/nextcloud\/apps\/memories\/bin-ext\/go-vod-amd64",
"preview_libreoffice_path": "\/usr\/bin\/libreoffice",
"enable_previews": true,
"enabledPreviewProviders": [
"OC\\Preview\\OpenDocument",
"OC\\Preview\\MSOffice2007",
"OC\\Preview\\MSOffice2010",
"OC\\Preview\\Movie",
"OC\\Preview\\Image",
"OC\\Preview\\HEIC",
"OC\\Preview\\TXT",
"OC\\Preview\\MarkDown",
"OC\\Preview\\PDF"
],
"app_install_overwrite": [
"sharingpath",
"holiday_calendars",
"printer",
"files_rightclick",
"drawio"
],
"memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
"memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
"maintenance_window_start": 1,
"memories.db.triggers.fcu": true,
"memories.gis_type": 2
}
}
Apps
The output of occ app:list (if possible).
occ app:list
Enabled:
- activity: 4.0.0
- analytics: 5.4.0
- app_api: 5.0.2
- bruteforcesettings: 4.0.0
- calendar: 5.2.4
- circles: 31.0.0
- cloud_federation_api: 1.14.0
- comments: 1.21.0
- contacts: 7.1.0
- contactsinteraction: 1.12.0
- dashboard: 7.11.0
- dav: 1.33.0
- deck: 1.15.1
- drawio: 3.1.0
- external: 6.0.2
- federatedfilesharing: 1.21.0
- federation: 1.21.0
- files: 2.3.1
- files_3dmodelviewer: 0.0.15
- files_automatedtagging: 2.0.0
- files_confidential: 3.2.0
- files_downloadlimit: 4.0.0
- files_external: 1.23.0
- files_pdfviewer: 4.0.0
- files_reminders: 1.4.0
- files_sharing: 1.23.1
- files_trashbin: 1.21.0
- files_versions: 1.24.0
- firstrunwizard: 4.0.0
- groupfolders: 19.0.4
- logreader: 4.0.0
- lookup_server_connector: 1.19.0
- mail: 5.0.7
- memories: 7.5.2
- music: 2.1.4
- nextcloud_announcements: 3.0.0
- notes: 4.12.0
- notifications: 4.0.0
- notify_push: 1.1.0
- oauth2: 1.19.1
- password_policy: 3.0.0
- phonetrack: 0.8.2
- photos: 4.0.0-dev.1
- previewgenerator: 5.8.0
- privacy: 3.0.0
- profile: 1.0.0
- provisioning_api: 1.21.0
- quota_warning: 1.21.0
- recognize: 9.0.1
- recommendations: 4.0.0
- related_resources: 2.0.0
- richdocuments: 8.6.5
- serverinfo: 3.0.0
- settings: 1.14.0
- sharebymail: 1.21.0
- spreed: 21.0.4
- support: 3.0.0
- survey_client: 3.0.0
- systemtags: 1.21.1
- text: 5.0.0
- theming: 2.6.1
- twofactor_backupcodes: 1.20.0
- twofactor_totp: 13.0.0-dev.0
- updatenotification: 1.21.0
- user_status: 1.11.0
- viewer: 4.0.0
- weather_status: 1.11.0
- webhook_listeners: 1.2.0
- workflow_media_converter: 1.13.5
- workflow_ocr: 1.31.0
- workflowengine: 2.13.0
Disabled: - admin_audit: 1.21.0
- encryption: 2.19.0
- sharingpath: 0.4.4 (installed 0.4.4)
- suspicious_login: 9.0.1
- twofactor_nextcloud_notification: 5.0.0
- user_ldap: 1.22.0
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.