RSS Problem

Putting the first line of the error message in the search box… could lead to a solution.
https://www.ads-software.com/search/XML+Parsing+Error%3A+xml+declaration+not+at+start+of+external+entity?forums=1

There’s a blank line at the top of your feed.

Oftentimes, that’s caused by a wayward plugin or your wp-config.php file. There cannot be any spaces or line feeds before the top
<?php
and the final
?>
tags in any php files.

[moshu’s a fast typer this morning!]