Following the steps in Collabora integration guide
On Nextcloud server (WAN: office)
./occ config:app:get richdocuments wopi_url =>
https://collab.kingma.ch
curl -I https://collab.kingma.ch/hosting/discovery
HTTP/1.1 200 OK
Server: openresty
Date: Tue, 15 Jul 2025 08:20:49 GMT
Content-Type: text/xml
Content-Length: 32276
Connection: keep-alive
Last-Modified: Tue, 15 Jul 2025 08:20:49
X-Content-Type-Options: nosniff
X-My-Custom-Header: SomeValue
The content: to large and uploads of .txt not allowed
On Collabora server (WAN: collab)
curl https://office.kingma.ch/status.php
{“installed”:true,“maintenance”:false,“needsDbUpgrade”:false,“version”:“31.0.7.1”,“versionstring”:“31.0.7”,“edition”:“”,“productname”:“Nextcloud”,“extendedSupport”:false}bash-5.2
In the administrator settings:
Collabora Online server is reachable.
Collabora Online Development Edition 25.04.3.2 9d9a449949
URL used by the browser:
https://collab.kingma.ch
Nextcloud URL used by Collabora:https://office.kingma.ch(Determined from the browser URL)
In Nextcloud loading a docx document results in
Failed to load Nextcloud Office - please try again later
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. 
- Nextcloud Server version:
Nextcloud 31.0.7
- Operating system and version:
#1 SMP PREEMPT Debian 1:6.12.34-1+rpt1~bookworm (2025-06-26)
- Web server and version:
Server version: Apache/2.4.62 (Debian)
- Reverse proxy and version:
nginx version: openresty/1.27.1.2
- PHP version:
PHP 8.3.23 (cli) (built: Jul 3 2025 23:52:34) (NTS)
- Is this the first time you’ve seen this error? (Yes / No):
yes
- When did this problem seem to first start?
prob direct after installation
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
OMV Container
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
nope
Configuration
Nextcloud
{
"system": {
"htaccess.RewriteBase": "\/",
"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",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"password": "***REMOVED SENSITIVE VALUE***",
"port": 6379
},
"upgrade.disable-web": true,
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"srv-nas-pi.kingma:8080",
"office.kingma.ch",
"office.king.ma"
],
"overwrite.cli.url": "https:\/\/office.kingma.ch",
"overwriteprotocol": "https",
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "31.0.7.1",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "465",
"mail_smpttimeout": 30,
"mail_smtpsecure": "ssl",
"loglevel": 3,
"maintenance": false,
"maintenance_window_start": 3,
"default_phone_region": "CH",
"app_install_overwrite": []
}
}
Apps
Enabled:
- activity: 4.0.0
- admin_audit: 1.21.0
- app_api: 5.0.2
- bruteforcesettings: 4.0.0
- calendar: 5.3.5
- circles: 31.0.0
- cloud_federation_api: 1.14.0
- comments: 1.21.0
- contacts: 7.1.5
- contactsinteraction: 1.12.0
- cookbook: 0.11.3
- dashboard: 7.11.0
- dav: 1.33.0
- encryption: 2.19.0
- federatedfilesharing: 1.21.0
- federation: 1.21.0
- files: 2.3.1
- 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
- fulltextsearch: 31.0.0
- groupfolders: 19.1.2
- logcleaner: 1.1.8
- logreader: 4.0.0
- lookup_server_connector: 1.19.0
- nextcloud_announcements: 3.0.0
- notes: 4.12.2
- notifications: 4.0.0
- oauth2: 1.19.1
- password_policy: 3.0.0
- photos: 4.0.0
- privacy: 3.0.0
- profile: 1.0.0
- provisioning_api: 1.21.0
- recommendations: 4.0.0
- related_resources: 2.0.0
- richdocuments: 8.7.2
- serverinfo: 3.0.0
- settings: 1.14.0
- sharebymail: 1.21.0
- support: 3.0.0
- survey_client: 3.0.0
- suspicious_login: 9.0.1
- systemtags: 1.21.1
- text: 5.0.0
- theming: 2.6.1
- twofactor_backupcodes: 1.20.0
- twofactor_nextcloud_notification: 5.0.0
- 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
- workflowengine: 2.13.0
Disabled:- richdocumentscode_arm64: 25.4.202 (installed 25.4.202)
- user_ldap: 1.22.0 (installed 1.22.0)
from the log
[richdocuments] Error: Failed to fetch discovery: cURL error 28: Connection timed out after 5000 milliseconds (see libcurl - Error Codes) for https://collab.kingma.ch/hosting/discovery
from ? by – at 15 Jul 2025, 09:10:12
Interesting as the URL works fine both from within nextcloud server as well as the browser.
net/SslSocket.hpp:387
