Wordpress - WooCommerce - Issues

I've installed WooCommerce on my WordPress installation; but for some reason when I changed the "SHOP" page to "CATALOG" the individual product pages no longer display - they prompt me w/ a 500 Server Error -- all the other pages seem to be working properly, that I can tell.

here's the site -///// REMOVED FOR CLIENT SAFETY ////// [please disregard the header nav issues as they are currently only functioning properly-ish on the home page]

all help and insight is appreciated; thanks in advance.

Please disregard my post, as it has been fixed - it must've been a cache issue.