Roundcube skin / install issue

Hi all,

Like I stated in my previous post, I'm still leaing to coop with CentOS7/DirectAdmin etc.

I've got a very small issue. Roundcube has been installed (works like a charm).
Except; the background is plain grey (Larry skin) instead of the linen background.

How can check what the issue is? And what can I do about it?

Thanks in advance!

The linen background has been removed for a more flatter style in recent updates .