@christophe9526 could you check the behaviour again in 2025.21.0 or later?
When I dug into this issue it appeared that it was failing due to no connection to a server, obviously you had a connection, but I believe it was a relay connection, which does not allow for downloading.
We’ve made some messaging changes to the error to indicate that the download failed while on a relay connection that should make this more clear and we’re working on some improvements to show the connection state in Libraries.
If the failure indicates it was a relay connection then you’ll want to troubleshoot your remote access, if it’s a generic or other failure reason updated client and server logs would be helpful to diagnose further.
