Collabora cannot save bigger files

[Limerick-gh]

Hi there
Using OpenCloud since a couple of weeks now and being very happy with it. Hosting it on Proxmox in LXC with offiical docker compose.
I just face an issue with Collabora when trying to work with bigger office documents. E.g. when inserting images to .odt or .docx documents, I get the following message:

Save failed because the document is too large or exceeds the remaining storage space. The document will now be read-only but you may still download it now to preserve a copy locally.

The user has no storage quota limit and disk is not full.
How to fix it or troubleshoot further?

[micbar]

That looks like a collabora issue. How limited is the storage space on the collabora server?

[Limerick-gh]

Thanks for swift reply.
Actually I tried to us a small footprint. The LXC with docker is just for the containers with 7GB in total. 2.3GB are free. Data directory is in a larger disk and mounted into the LXC and docker (2TB where 1TB is free).
Just now, I extended to container to 10GB and 5GB are available. But the result is the same.
In OpenCloud these documents are also locked and showing a lock icon as status.

[Limerick-gh]

Guess I figured it out.
The image I added was more than 10MB.

I modified the nginx config entries from
client_max_body_size 10M;
to
client_max_body_size 0;

There have been entries in the section of server and collabora.
Adding it also to WOPI section fixed it finally.