Documents fail to load

[SKJoy]

Documents fail to load with NextCloud

NextCloud document opening results with Document loading failed, Failed to load Nextcloud office - please try again later error message.

Steps to reproduce

• Deployed NextCloud in one server without builtin Collabora CODE server
• Deployed this Docker instance on another server
• Configured NextCloud office Collabora Online server URL; NextCloud says it can CONNECT happily
• Attempting to open any document results into the FAIL message

What is the expected correct behavior?

NextCloud should be able to present the document in the browser online

Relevant logs and/or screenshots

Enabled Collabora log to file and below are the messages for each request;

[ websrv_poll ] ERR  unknown UI default's component UITheme| wsd/FileServerUtil.cpp:99
[ websrv_poll ] ERR  FileServerRequestHandler: File not found: Invalid URI request: [/browser/8fe1f0fe/branding.css].| wsd/FileServer.cpp:684
[ websrv_poll ] ERR  FileServerRequestHandler: File not found: Invalid URI request: [/browser/8fe1f0fe/branding.js].| wsd/FileServer.cpp:684
[ websrv_poll ] ERR  FileServerRequestHandler: File not found: Invalid URI request: [/browser/8fe1f0fe/branding-desktop.css].| wsd/FileServer.cpp:684
[ websrv_poll ] ERR  #25: #25 Exception while processing incoming request: [GET /cool/https:/fqdn.nextcloud.host/index.php/apps/richdocuments/wopi/files/861_ocbiwf1nom8r%3Faccess_token=vsBZEL48C0kJIHaeZEoAYGLvqa1su8CU&access_token_ttl=0/ws?WOPISrc=https%3A%2F%2Ffqdn.nextcloud.host%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F861_ocbiwf1nom8r&compat=/ws HTTP/1.1
...]: Bad URI syntax| wsd/COOLWSD.cpp:4256
[ websrv_poll ] ERR  #25: #25 Exception while processing incoming request: [GET /cool/https:/fqdn.nextcloud.host/index.php/apps/richdocuments/wopi/files/861_ocbiwf1nom8r%3Faccess_token=vsBZEL48C0kJIHaeZEoAYGLvqa1su8CU&access_token_ttl=0&permission=edit/ws?WOPISrc=https%3A%2F%2Ffqdn.nextcloud.host%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F861_ocbiwf1nom8r&compat=/ws HTTP/1.1
...]: Bad URI syntax| wsd/COOLWSD.cpp:4256

Environment

• Image version / tag: 23.05.5-2 / latest
• Host OS: AlmaLinux 8 x64

Docker compose YML

services:
  collabora:
    image: tiredofit/collabora-online:latest
    hostname: fqdn.collabora.host
    restart: unless-stopped
    environment:
      - LOG_TYPE=FILE
      - ALLOWED_HOSTS=fqdn.nextcloud.host
    volumes:
      - ${COLLABORA_SERVICE_VOLUME_PATH}log:/logs
      - ${COLLABORA_SERVICE_VOLUME_PATH}asset/custom:/assets/custom
      - ${COLLABORA_SERVICE_VOLUME_PATH}asset/custom/font:/assets/custom-fonts
      - ${COLLABORA_SERVICE_VOLUME_PATH}asset/custom/script:/assets/custom-scripts
      - ${COLLABORA_SERVICE_VOLUME_PATH}certificate:/etc/coolwsd/certs
    cap_add:
      - MKNOD
      - NET_ADMIN
    privileged: true

NginX

• Reverse proxy
• SSL certificate resolver
• ProxyPass to HTTP at 9980 port
• All generic response header defined
• All generic request header defined; like X-Forwarded-For, etc.

Direct HTTP call to https://fqdn.collabora.host/hosting/capabilities responds correctly

{
    "convert-to": {
        "available": false
    },
    "hasMobileSupport": true,
    "hasProxyPrefix": false,
    "hasTemplateSaveAs": false,
    "hasTemplateSource": true,
    "hasZoteroSupport": true,
    "productName": "Document Editor",
    "productVersion": "23.05.5.2",
    "productVersionHash": "8fe1f0fe",
    "serverId": "f324c0e5"
}

Possible fixes

Looking towards :)