Converter url: document signature in OnlyOffice Groups

Hi,
I installed community edition of OO Docs and OO Group on separate servers with Debian 12(not Docker).

https://helpcenter.onlyoffice.com/installation/docs-community-install-ubuntu.aspx?_ga=2.121380878.782359554.1594636128-1157782750.1587541027

https://helpcenter.onlyoffice.com/installation/groups-install-ubuntu.aspx

Both of them works good spearately but documents from OO Groups can only be downloaded instead of opening in OO Docs to edit.
Configuring OO Groups: Integration → Document service and setting proper IP addresses I see “Converter url: document signature”

Hello @marcin
Please reproduce the issue ( “Converter url: document signature” pop-up message on the Save button) and provide us with Document server logs folder. It’s located here:
docker: /app/onlyoffice/DocumentServer/logs/documentserver/
deb\rpm: /var/log/onlyoffice/documentserver/
Additionally, please make a screenshot of your settings on the Document Service page on the Groups side.