I've recoded the entire plugin to fix bugs and make the plugin available to more versions of Minecraft. This plugin now supports and requires the newest version of TabuuCore (which can be downloaded for free here).

Also the name has changed! The plugin is now called PermissionShopZ!

Fixes include (but are not limited to):

• NPE errors,
  
• being able to add air items that cause errors,
• errors when opening the shop interface,
• errors when opening the shop edit interface.

IMPORTANT
If you are updating from an older version: the data.yml is no longer used. The perks will have to be re-added. The config.yml has also been updated! The default "IRON_FENCE" can not long be used and will result in error, the replacement is "IRON_BARS".