Program: 33799
Project: 33799
Buggy source:
/** 
 * This loads the minishop from the minishop.yml file
 */
public static void loadShop(){
  store.clear();
  miniShopFile=Util.loadYamlFile("String_Node_Str");
  allowSelling=miniShopFile.getBoolean("String_Node_Str",false);
  ConfigurationSection items=miniShopFile.getConfigurationSection("String_Node_Str");
  ASkyBlock plugin=ASkyBlock.getPlugin();
  if (DEBUG)   plugin.getLogger().info("String_Node_Str" + items.toString());
  if (items != null) {
    int size=items.getKeys(false).size() + 8;
    size-=(size % 9);
    miniShop=Bukkit.createInventory(null,size,plugin.myLocale().islandMiniShopTitle);
    int slot=0;
    for (    String item : items.getKeys(false)) {
      try {
        String m=items.getString(item + "String_Node_Str");
        Material material=Material.matchMaterial(m);
        int quantity=items.getInt(item + "String_Node_Str",0);
        String extra=items.getString(item + "String_Node_Str","String_Node_Str");
        double price=items.getDouble(item + "String_Node_Str",-1D);
        double sellPrice=items.getDouble(item + "String_Node_Str",-1D);
        if (!allowSelling) {
          sellPrice=-1;
        }
        String description=ChatColor.translateAlternateColorCodes('&',items.getString(item + "String_Node_Str","String_Node_Str"));
        MiniShopItem shopItem=new MiniShopItem(material,extra,slot,description,quantity,price,sellPrice);
        store.put(slot,shopItem);
        miniShop.setItem(slot,shopItem.getItem());
        slot++;
      }
 catch (      Exception e) {
        plugin.getLogger().warning("String_Node_Str" + slot);
        plugin.getLogger().warning(e.getMessage());
        e.printStackTrace();
      }
    }
  }
}

Fixed version (ground truth):
/** 
 * This loads the minishop from the minishop.yml file
 */
public static void loadShop(){
  store.clear();
  miniShopFile=Util.loadYamlFile("String_Node_Str");
  allowSelling=miniShopFile.getBoolean("String_Node_Str",false);
  ConfigurationSection items=miniShopFile.getConfigurationSection("String_Node_Str");
  ASkyBlock plugin=ASkyBlock.getPlugin();
  if (items != null) {
    int size=items.getKeys(false).size() + 8;
    size-=(size % 9);
    miniShop=Bukkit.createInventory(null,size,plugin.myLocale().islandMiniShopTitle);
    int slot=0;
    for (    String item : items.getKeys(false)) {
      try {
        String m=items.getString(item + "String_Node_Str");
        Material material=Material.matchMaterial(m);
        int quantity=items.getInt(item + "String_Node_Str",0);
        String extra=items.getString(item + "String_Node_Str","String_Node_Str");
        double price=items.getDouble(item + "String_Node_Str",-1D);
        double sellPrice=items.getDouble(item + "String_Node_Str",-1D);
        if (!allowSelling) {
          sellPrice=-1;
        }
        String description=ChatColor.translateAlternateColorCodes('&',items.getString(item + "String_Node_Str","String_Node_Str"));
        MiniShopItem shopItem=new MiniShopItem(material,extra,slot,description,quantity,price,sellPrice);
        store.put(slot,shopItem);
        miniShop.setItem(slot,shopItem.getItem());
        slot++;
      }
 catch (      Exception e) {
        plugin.getLogger().warning("String_Node_Str" + slot);
        plugin.getLogger().warning(e.getMessage());
        e.printStackTrace();
      }
    }
  }
}