OnlyOffice with Nextcloud and Wireguard VPN won't open any documents

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1

Hi everyone,

I have recently started my own home server and am quite proud to say that I’ve come pretty far with it - yay :slight_smile:

Here is my problem: I have OnlyOffice (9.4.0) connected to Nextcloud (34.0.0). Both are installed with docker-compose files; and both are behind a proxy set up with Nginx Proxy Manager (incl. SSL certificates). However, when I try to open a document, I just get a black loading screen (with the white page loading animation).

I really don’t know why this is happening. The following things are working well:

  • I can use and access Nextcloud fine and without any problems.
  • The OnlyOffice welcome page shows up without errors (…/welcome)
  • The OnlyOffice healthcheck URL returns true (…/healthcheck)
  • The connector on Nextcloud returns a success message when I click Save: “Server settings have been successfully updated (version 9.4.0.129)”

However, I do see errors in the ngins.error.log from within the OnlyOffice docker container. These errors appear when I try to access /info/info.json. I tried this because I read somewhere to check this JSON for access to API endpoints. Clearly this is not working - the connection is refused. Interestingly, it is refused both from the proxy URL and also when I try to access it directly on my local LAN IP (without any SSL).

2026/06/21 06:32:57 [error] 11394#11394: *55 access forbidden by rule, client: 10.99.99.1, server: , request: “GET /info/info.json HTTP/1.1”, host: “``onlyoffice.[URL...]``”
2026/06/21 06:33:14 [error] 11394#11394: *58 connect() failed (111: Connection refused) while connecting to upstream, client: 10.99.99.1, server: , request: “GET /example/ HTTP/1.1”, upstream: “``http://127.0.0.1:3000/``”, host: “``onlyoffice.[URL...]``”
2026/06/21 06:33:14 [error] 11394#11394: *58 connect() failed (111: Connection refused) while connecting to upstream, client: 10.99.99.1, server: , request: “GET /example/ HTTP/1.1”, upstream: “``http://127.0.0.1:3000/``”, host: “``onlyoffice.[URL...]``”
2026/06/21 06:38:29 [error] 11394#11394: *82 access forbidden by rule, client: 10.99.99.1, server: , request: “GET /info/info.json HTTP/1.1”, host: “``onlyoffice.[URL...]``”
2026/06/21 07:08:22 [error] 11394#11394: *178 access forbidden by rule, client: 10.99.99.1, server: , request: “GET /info/info.json HTTP/1.1”, host: “``onlyoffice.[URL...]``”
2026/06/21 07:09:20 [error] 11394#11394: *179 access forbidden by rule, client: 10.99.99.4, server: , request: “GET /info/info.json HTTP/1.1”, host: “192.168.[URL...]”

Do you have any idea what might be the problem? I’d be so grateful for a pointer. I have browsed through endless forums, tried to adjust the Nginx Proxy Manager settings with custom configurations etc. etc. etc. But nothing is working :frowning:

2

Sorry, I forgot to mention something: Nextcloud and OnlyOffice are hosted on my home server. I have set up a Wireguard VPN with a VPS to have a steady IP and URL (for external access to Nextloud and a few other apps). This means that my proxy URLs are connected to the Nextcloud and OnlyOffice containers via the Wireguard IP.

As mentioned, I can access Nextcloud fine without problems. The OnlyOffice healthcheck and welcome page shows up correctly. And the Connector also gives a success message when saving settings. but still, the document editor won’t load :frowning:

3

Okay, so purely by accident I came across this post about OnlyOffice connecting to the latest Nextcloud version. And I found that apparently there is a problem with uBlock Origin blocking access to Analytics.js.

See this post: Will OnlyOffice support Nextcloud 34.0? - #7 by theking2

I have disabled uBlock Origin - and now it is working :smiley:

I guess this is a note to the developers though to look into this issue - if you can :slight_smile:

5

Hello @danielbru
Thank you, the fix for this behavior ( uBlock origin\Analytics.js) will be included to the next Document server Community edition release (v.9.5).