engine_fetch_asset() and engine_send_file() failed when in group chat

[bbiwy1984]

When in a group chat and a file is sent to the group, the following code snippet fails (400) to work:

        case GENERIC_MESSAGE__CONTENT_ASSET:
            struct Asset *asset;
            struct Asset__Original *ao;
            Asset__RemoteData *ar;
            asset = gm->asset;
            ao = asset->original;
            ar = asset->uploaded;

            engine_fetch_asset(zcall_engine, conv->id, ar->asset_id, "/tmp/");

Also, while in a group chat, calling engine_send_file using for example: engine_send_file(conv, "image/jpeg", "/tmp/x.jpg"); also fails (404).