Fatal error: Uncaught Error: Call to undefined function is_product() in /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-content/themes/lens/inc/includes/functions/quantity.php:11 Stack trace: #0 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-includes/template.php(503): require() #1 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-includes/template.php(477): load_template('/homepages/37/d...', false) #2 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-includes/general-template.php(171): locate_template(Array, true, false) #3 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-content/themes/lens/wpgrade-core/wpgrade.php(643): get_template_part('//inc/includes/...') #4 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-content/themes/lens/wpgrade-core/hooks.php(17): wpgrade::require_all('/homepages/37/d...') #5 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-includes/template.php(503): require('/homepages/37/d...') #6 /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-includes/template.php(477): load_template(' in /homepages/37/d21221336/htdocs/2015web/cwwp2014/wp-content/themes/lens/inc/includes/functions/quantity.php on line 11