Background image custom CSS not working

I am trying to add a background image to a single page on my site. I am using the custom CSS as follows: {
background-image: url(‘’);

The page ID (as far as I can tell) is 2, here is a link to the page:

What am I doing wrong?

hey there

Looks like you already managed to fix your question, i can see the image is added to your page
Colorlib Support Team