Hope template.

I am trying to change the image to a URL, the block is Slideshow (full width)

However it's not displaying when I change the image to a URL. When I look at the browser console I can see a 403 forbidden error.

It looks like the full URL is appearing after my site URL - see below.

http://localhost/cls/https://images.unsplash.com/photo-1615732224643-b000ac40c8b6?ixlib=rb-4.0.3&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=726&q=80

I am able to achieve the exact same thing on different templates.

Can someone advise.