Can't upload files in a document, but to the NextCloud

ℹ️ Support 📄 Collabora
#1

Hi,
i have the problem, that if I try to upload, for example, a picture to a document opened in Collabora Online I get the error showing up in a pop-up Uploading file to server failed with status: 400. I can upload files directly to the NextCloud server over the app, webdav and the webpage and then add this to a document.
I am running the built-in Code Server for Collabora and have my NextCloud running with a Apache web server with the NC files in the root and behind a Nginx reverse proxy. Everything is running over https, the connection to the reverse proxy and also the connection from the reverse proxy to my web server for the NC.
I can’t find any related errors in the logs of the nc and the browser just says POST https://[MYDOMAIN.EXAMPLE]/apps/richdocumentscode/proxy.php?req=/cool/https%[i guess unimportend stuff]&compat=/ws 400.

I hope anybody has an idea how this could be fixed.

Thanks for reading.

#2

not exactly the same but my NC25 running with separated Collabora as Docker successfully adds images into writer doc through both ways copy&paste and Insert > local image

#3

okay, then i will give it a try and setup an external server for that.