The script prevents the downoad of the content

If I turn on NGINX on one of my subdomains, I do not download the contents of the server error pages (particular error 403)
When I look at the source code (Ctrl + U), I see that there is a script and links to images have incorrect links (see the screenshot)

Although 404 error loads the image normally


PS. Is this a problem with me or CLOUDFLARE?

You have a relative path for the image, images/favicon_error.png is a relative path. I believe you want this to be absolute /images/favicon_error.png + images/ + /images/

The fact is that the error 404 loads normally

And the error 403 even indicating the absolute path is the same