Hi all, I find an error 500 when I upload a file via the plugin files. The error in the nginx log as follows:
"PHP message: [BACKEND_WEBDAV]: [PUT] put fatal: HTTP error response. (Errorcode 502)
PHP message: PHP Fatal error: Uncaught Files \ Backend \ Exception: [500]: The file server encountered a problem. Maybe you entered an incorrect address?

thrown in /usr/share/kopano-webapp/plugins/files/php/Files/Backend/Webdav/class.backend.php on line 578 "while reading response header from upstream, client:, server: xxxx.xxxxxxx .xx, ​​request: “POST /index.php?load=custom&name=upload_file&keep_both=false HTTP / 1.1”, upstream: “fastcgi: // unix: /var/run/php/php7.0-fpm.sock:”, host: “xxx.xxxxx.xx”, referrer: "https://xxxx.xxxxxx.xxx/"
The versions used are:
Core: core- + 196-Debian_9.0-amd64
Files: files-
PHP: PHP 7.0.27-0 + deb9u1
Nginx: nginx version: nginx / 1.10.3

In Chrome I get this error:
“Server with a status of 500 (Internal Server Error)”

I can download files and create new folders.