Describe the Bug

When I edit a document opened from a Nextcloud and I want to insert an image from my nextcloud into the document, I can browse my files, but when I click "insert file", nothing happen, and collabora logs this:

dec. 03 11:07:47 hostname coolwsd[1931654]: kit-1931654-1931654 2025-12-03 11:07:47.068565 +0100 [ kitbroker_2137 ] ERR  ToMaster-4a0e2: CALLBACK_ERROR: { "code": 24581, "kind": "network", "cmd": "insert"}| kit/ChildSession.cpp:3742
dec. 03 11:07:47 hostname coolwsd[1931654]: kit-1931654-1931654 2025-12-03 11:07:47.068686 +0100 [ kitbroker_2137 ] ERR  ToMaster-4a0e2: error: cmd=insert kind=network code=24581| common/Session.hpp:181

We found a way to reproduce, stated below:

Steps to Reproduce

1. Install collabora
2. Setup the configuration to have a remote_config url
3. This remote_config URL spit out a JSON file containing a storage > wopi > alias_groups > groups > host > "https://mynextcloud.com"
4. open an ODT document from mynexcloud.com using this collabora
5. The document opens properly
6. click Insert > Illustration > Image > Image... and select an image from your nextcloud
7. click "insert this file" => nothing happen

To make it work we MUST add mynextcloud.com in the lok_allow key in the coolwsd.xml configuration statically

Expected Behavior

I expect lok_allow to be a dynamic configurable list too.

We tried to setup the remote_config with a lok_allow key too as follow:

{ "kind":"configuration", "net": { "lok_allow": { "hosts" : ["mynextcloud.com"]  }   }  }

but it didn't work.

Actual Behavior

lok_allow is a static configuration list, it's seems to be read at boottime and can't be modified later.

• Collabora version: collabora online lite version 25.04.7-3
• OS and version: server running Debian 12
• Browser and version: Chrome 142