Okay I took a peek and I see some improvements.
But as a guest testing the shoutbox I get a message that states:
"You do not have permission to use shoutbox"
It does not look like a standard message from ubb because it is a popup dialog.
Yeah, that was always there since the beginning of my installation from years ago. You should, even as a guest and not logged in, be able to see the Shout Box entries.
Might want to start with checking user settings for access:
Control Panel ยป Site Permissions
Can use the shoutbox
Can see the shoutbox
All checked out, everyone has permission (indicated by the number "1" in the field) to see it and everyone, except guests, have permission to use it.
Are we at the end of our rope here?