#vulnerable code 
                             @Override
	public void extractConfigurationParameters() {
		configHideNotReceivedCategories = mainConfig.getBoolean("HideNotReceivedCategories");
		configHideNoPermissionCategories = mainConfig.getBoolean("HideNoPermissionCategories");

		langListGUITitle = ChatColor.translateAlternateColorCodes('&', LangHelper.get(GuiLang.GUI_TITLE, langConfig));

		ItemMeta itemMeta = lockedItem.getItemMeta();
		String displayName = "&8" + LangHelper.get(GuiLang.CATEGORY_NOT_UNLOCKED, langConfig);
		itemMeta.setDisplayName(ChatColor.translateAlternateColorCodes('&', displayName));
		lockedItem.setItemMeta(itemMeta);
	} 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Override
	public void extractConfigurationParameters() {
		configHideNotReceivedCategories = mainConfig.getBoolean("HideNotReceivedCategories");
		configHideNoPermissionCategories = mainConfig.getBoolean("HideNoPermissionCategories");

		langListGUITitle = ChatColor.translateAlternateColorCodes('&', LangHelper.get(GuiLang.GUI_TITLE, langConfig));
	}