I recently purchased a number of Lava Directory add ons, including the Custom Field Add On. Not only does it not give me the option to create custom fields under JavoSpot Theme Options -> Listings, but it breaks the listing editor page and displays this error:
Fatal error: Call to a member function get() on a non-object in /home/sipofthe/public_html/wp-content/plugins/lava-directory-custom-field/includes/class-core.php on line 255
I sent an email to the support team but have not heard anything back.