Timeout error when integrating Nextcloud and Onlyoffice?

Question

Nginx

Good afternoon! Need help. Unable to link Nextcloud app to Onlyoffice.
I configured Nextcloud and Onlyoffice applications from docker containers. Separate applications work.
Works on self-signed ssl certificates. A reverse proxy is configured before Nextcloud. Proxy the name example to 192.168.1.10:8088. The application opens. When adding a server from a web browser, an error occurs "An error occurred while trying to connect (Request or timeout error).
Searching the Internet gives an answer that it swears at self-signed certificates. But they supposedly should work on a local network without valid certificates.
Which side "dig" ?
Logs from nextcloud server:

{"reqId":"8aTGtsuZtKwWXD9J75iU","level":3,"time":"2017-09-25 17:55:41","remoteAddr":"172.17.0.1","user":"nextcloud", "app":"onlyoffice","method":"PUT","url":"\/apps\/onlyoffice\/ajax\/settings","message":"CommandRequest on check error: \u041e\u0448\ u0438\u0431\u043a\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u0438\u043b\u0438 \u0442\u0430\u0439\u043c\u0430\uilla0443\u0442","user"\u0442 /5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36","version":"12.0.3.3"}

I am attaching a screenshot of adding a server from the web interface.
Thanks in advance for any help.

Answer 1

Hello Rick,
Please try to use internal addresses to connect. Click on the "Additional server settings" tab and enter internal addresses, leave the secret key field blank.