shortcut not working

Tried to see my slideshow with the url/slideshow/name shortcut and got an error 404. Tried this on a Genesis Framework version and a regular version.

e.g. I have a permalink http://koufax.pqwee.com/slideshow/why/

I see function the_content($content) and function url_shortcode( $attr, $content = ” )

not sure how it gets hooked to index.php – maybe new conflict since older versions? Thoughts?

https://ww.wp.xz.cn/plugins/presenter/