Solved for loop error?

Hey thanks for clicking on my post! I was working on a plugin but than i came across a problem.
My for loop does not work.

Code:

public class BMKLists
{

    public static HashMap<UUID, Long> BANTIME = new HashMap<UUID, Long>();
    public static HashMap<UUID, Long> MUTETIME = new HashMap<UUID, Long>();

    public void load()
    {

        BMKYml.get().createSection("ban");
        BMKYml.get().createSection("mute");

        for (String s : BMKYml.get().getConfigurationSection("ban").getKeys(false))
        {
            Bukkit.broadcastMessage("test");

            UUID uuid = UUID.fromString(s);
            long time = BMKYml.get().getInt("ban." + s);
            BANTIME.put(uuid, time);
        }

        for (String s : BMKYml.get().getConfigurationSection("mute").getKeys(false))
        {
            UUID uuid = UUID.fromString(s);
            long time = BMKYml.get().getInt("mute." + s);
            MUTETIME.put(uuid, time);
        }
    }
}

my yml file

Code:

ban:
  1edf7356-1f89-4605-bd09-1f2c7a8c7050: 1490183963167
  1edf7356-1f89-4605-bd09-1dfc7a8c7050: 1490183963167
  1edf7356-1f89-4605-bd09-8dfn7a8c7050: 1490183963167
mute: {}

i was wondering maybe you guys could find out what is wrong.
it just doesn't do anything

and yes this method is called in my onEnable

 

@GijsCo Is the problem really solved? If yes please provide the solution to the problem for future reference.
also I see :

are those attempts to make constant variables or is it 'static for easy access'?

 

@mine-care
those are constant variables.
And i fixed btw.
BMKYml.get().createSection("ban");
BMKYml.get().createSection("mute");
those 2 lines where the problem i don't really know why it wouldn't wotk with these lines. But i just putted an if statement if the sections didn't exist than create the sections.

 

Well static variables =/= constant variables. A constant is a static and final variable