This update fixed the GUI menu and now makes it possible for admins to access a alternative way of obtaining each crystal.

Newest permission is sc.gui
Newest command /sc admin

For the User who contacted me about the plugin not working.. FYI buddy.. the plugin said Disabled on your stack trace so either use the latest version of spigot/paper or install Vault if you havent as this plugin is dependant on Vault.

if the error persists let me know.