Errors all Over Page with WP Online Store

http://www.DukesGolfOnlineStore.com

If you go to the site there are errors talking about line 37 and a few other lines, all over the site. Yesterday they were not there, I didn’t do any updates or anything over night, can someone please help.

There are no plugin or theme updates in the Queue.

Strict Standards: Only variables should be passed by reference in /home1/dukegolf/public_html/wp-content/plugins/wp-online-store/includes/functions/html_output.php on line 37

That error shows up everywhere on the page it used to be a clean looking site.

Please help this is for a close friend of mine I am trying to fix.