how to fix this
Thanks you
There is no fix, this is a design choice.
If the file were larger than 256kb, let’s say on the order of many megabytes, it would be very resource-wasteful for MineOS to send this huge file to your browser–both wasteful on the server and the client end.
If you need to read this file, either a) read the log items that appear from the moment you start the webui (which is how most people will) or b) read the file directly by connecting to your server and opening it with a text editor or c) copy the file as a file to your workstation and open it with a text editor on your desktop.