Sitewide Background Image Disappeared

I used the following code to create a background image used for every page of my client's site, but it has mysteriously disappeared in the last month or two.

Not sure what to do! Any suggestions?

Site URL: https://www.urban-factors.com

/* Site Background Image */

#page{
background-image: url(https://static1.squarespace.com/static/63c8554ce3460e106eb9e079/t/63c85562e3460e106eb9e1d6/1673919666550/GRID_grey_light.png);
background-size: cover
}

/* Make page section backgrounds transparent */

#page .page-section {
background: transparent!important
}

#page .page-section .section-background {
background: transparent !important;
}
 

The Console shows the following error:

Failed to load resource:  The server responded with a status of 404 () (GRID_grey_light.png, line 0)

https://static1.squarespace.com/static/63c8554ce3460e106eb9e079/t/63c85562e3460e106eb9e1d6/1673919666550/GRID_grey_light.png

You can upload new image and get new url then add to code