Keys not adding to arrayList

I have a config, in which some nodes in the form of numbers are stored. When I try to add them to a list, it doesn't give an error. But when I try to acces them, I get an NPE. I've done a little bit of debugging, and found out that the nodes are not added.

Code:

Code:

public static void makeFoodInv(Player p, Core core){
       
        inv = Bukkit.createInventory(null, 9, "Eten");
       
        ConfigurationSection path = core.getConfig().getConfigurationSection("inv.eten");
       
        List<ConfigurationSection> itemList = new ArrayList<ConfigurationSection>();
       
        for(String key : path.getKeys(false)){
           
            itemList.add(path.getConfigurationSection(key));
           
        }
       
        for(int i = 0; i < itemList.size(); i++){
           
            p.sendMessage(itemList.get(i).toString()); // Here's the NPE
           
        }
       
        p.openInventory(inv);
       
    }

If anyone can help, feel free to reply

 

Tried it without the list & in the 1st loop, now the output is zero for each one.