This happens because the hardcoded URLs were not updated when the site architecture changed.
Broken images
break when image files are moved or russia phone number example deleted without updating the links in the HTML code.
The <img> link in the HTML code still points to the obsolete location, but the image file is gone.
That brings up the "missing image" icon which looks something like this:
A "lost image" icon
When this happens, the page still contains the old image link that pointed to the file's previous location. But the image file itself is gone, creating the broken link.
Domain name change
Links to redesigned, retired, or migrated external sites can cause broken outbound links.
External sites that return 502 Bad Gateway errors indicate that their servers cannot be found.
The resulting error page may look like this:
A 502 gateway error page
For example, your site may link to, but visitors receive a Bad Gateway error because that domain no longer exists.
Why does it happen?