Directory Plugin - normal blog posts

I've created a blog page and used the template "blog news" for the page.

Created a couple posts...

Went to blog page on front end and my posts were there, but when clicking to go to the blog post it throws the error "Fatal error: Call to undefined function dp_posted_on() in /home/chrisba/public_html/wp-content/plugins/directory/themes/default/loops/loop-single.php on line 7" over in the "post-meta" div on the right hand side.

On line 7 of loop-single.php is "<?php dp_posted_on(); ?>"

Anyone know of a fix to still use normal blog posts with the directory plugin?