vq2-system_library_template.php on line 21

I have a template that is not working correctly and needed to see where I need to apply a change

2015-03-08 9:07:25 - PHP Notice: Error: Could not load template /nfs/c08/h04/mnt/172502/domains/marygolddelivery.com/html/store/catalog/view/theme//template/mail/_mail.tpl! in /nfs/c08/h04/mnt/172502/domains/marygolddelivery.com/html/store/vqmod/vqcache/vq2-system_library_template.php on line 21


Unsure where to fix the issue