This carousel is empty, please add some logos!

Brill plugin, perfect for what I need.

However Ive used the php code in the header.php file but its displaying ‘This carousel is empty, please add some logos’, despite there being logos in there and it working further down the page?

http://robertoonline.co.uk

Please help.

Thanks in advance

https://ww.wp.xz.cn/plugins/kiwi-logo-carousel/