The document could not be opened

When I try to edit a doc via nextcloud I get error like “content lock” error

My environement :

docker image
nextcloud:22
onlyoffice/documentserver:latest

reverse proxy
from https:// nextcloud.XXXXXX.fr to http:// localhost:8085
from https:// onlyoffice.XXXXXX.fr to http:// localhost:8666

I use a wildcard SSL certificate

when I try to edit a doc from the onlyoffice/example page I get : “The document could not be saved. Please check connection settings or contact your administrator.”

with the error log Error:
Error: Error response: statusCode:404; headers:{"date":"Sun, 06 Feb 2022 23:18:54 GMT","server":"nginx/1.18.0 (Ubuntu)","content-type":"text/html; charset=utf-8","vary":"Accept-Encoding","x-powered-by":"Express","content-security-policy":"default-src 'none'","x-content-type-options":"nosniff","content-encoding":"gzip","keep-alive":"timeout=5, max=100","connection":"Keep-Alive","transfer-encoding":"chunked"}; [2022-02-06T23:18:54.642] [ERROR] nodeJS - error downloadFile:url=http://onlyoffice.xxxx.fr/download?fileName=new.pptx&useraddress=xx.xx.xxx.xx__10.0.3.1;attempt=3;code:null;connect:null;(id=xx.xx.xx.xx__10.0.3.1http___onlyoffice.xxx.fr_files_xx.xx.xx.xxx__10.0.3.1_new.pptx1644174597022)

Sorry for my poor english.

Hello @teauma

when I try to edit a doc from the onlyoffice/example page I get : “The document could not be saved. Please check connection settings or contact your administrator.”

Is this issue related to integrated example only? or is there the same issue with Nextcloud integration?

Please go to ONLYOFFICE connector page > click Save button and show us the output result. After that provide us with whole Document server logs folder.