Category Listing Shortcode Error

When attempting to add the shortcode to one of my posts I’m getting this error using WP-DEBUG:

Fatal error: Call to a member function getStoreLabel() on a non-object in /app/design/frontend/default/mytheme/template/catalog/product/price.phtml on line 50

Any ideas? Thanks!

https://www.ads-software.com/plugins/magento-wordpress-integration/