Solved NullPointerException and not a clue in the world

Hey guys, i've been working on a plugin that is an all-around combat plugin, and i've been having this problem.
Basically, i've been trying to detect when someone's Boolean is true when they chat, and if it is, proceed and execute the code.
Here is my code:

Code (Text):

    @EventHandler
    public void onChat(AsyncPlayerChatEvent event) {
        if (!setnottaggedmessage.get(event.getPlayer().getUniqueId().equals(true))) {
            return;
        }
        getLogger().info("Set cancelled called!");
        event.setCancelled(true);
        nottaggedmessage = event.getMessage();
        setnottaggedmessage.put(event.getPlayer().getUniqueId(), false);
    }

It is trying to pull it from this map:

Code (Text):

    private Map<UUID, Boolean> setnottaggedmessage = new HashMap<>();

But i'm getting a NullPointerException on line 313, the if (!setnottaggedmessage) line.
IntelliJ is saying that the statement might not contain objects of a Boolean.
Here is where I set their Boolean to true:

Code (Text):

    @EventHandler
    public void onClick(InventoryClickEvent event) {
        Inventory inventory = event.getClickedInventory();
        if (inventory.getName().equalsIgnoreCase(ChatColor.DARK_GRAY + "Killsplus - Combat Tag Config")) {
            event.setCancelled(true);
            Player player = (Player) event.getWhoClicked();
            if (event.getSlot() == 3) {
                player.closeInventory();
                settaggedmessage.put(event.getWhoClicked().getUniqueId(), true);
                player.sendMessage(ChatColor.BLUE + "Type your 'No Longer Tagged' Message in the chat!");
                player.sendMessage(ChatColor.BLUE + "Remember, %player% will be replaced with the player name and you can use colour-codes too!");

And here is the error i get:

Code (Text):

[07:21:50] [Server thread/INFO]: _FireNinja issued server command: /kps config
[07:21:52] [Async Chat Thread - #0/ERROR]: Could not pass event AsyncPlayerChatEvent to KillsPlus v1.0
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at net.minecraft.server.v1_8_R1.PlayerConnection.chat(PlayerConnection.java:1036) [spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:975) [spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at net.minecraft.server.v1_8_R1.PacketPlayInChat$1.run(PacketPlayInChat.java:47) [spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_45]
    at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_45]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_45]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_45]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.NullPointerException
    at me.fireninja.killsplus.Main.onChat(Main.java:313) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_45]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_45]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_45]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_45]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot-1.8.jar:git-Spigot-d0d1d87-bc03b6f]
    ... 12 more
[07:21:52] [Async Chat Thread - #0/INFO]: <_FireNinja> &a%player% you are no longer tagged! &9HOORAY&a![m

At this point I am completely lost, I need to figure out how to detect the Boolean some other way is what I think I need to do.
Does anyone know how they could help me?
Thanks,
-FireNinja

 

No, I want to cancel if it is false, your solution didn't work either, same error ;-;
Will try adding a null detector now

 

Switched my code to this:

Code (Text):

    @EventHandler
    public void onChat(AsyncPlayerChatEvent event) {
        if (!setnottaggedmessage.get(event.getPlayer().getUniqueId().equals(null))) {
            getLogger().info("Null method called!");
            return;
        }
        if (!setnottaggedmessage.get(event.getPlayer().getUniqueId())) {
            getLogger().info("False method called!");
            return;
        }
        if (setnottaggedmessage.get(event.getPlayer().getUniqueId())) {
            getLogger().info("Set cancelled called!");
            event.setCancelled(true);
            nottaggedmessage = event.getMessage();
            setnottaggedmessage.put(event.getPlayer().getUniqueId(), false);
        }
        return;
    }

And still i'm getting the same error, P.S I know there is a || function, not using for debug rn

EDIT: Also, not a single logger did anything in the console :_:

 

Ok, I just tried that, but sadly still the exact same result...

 

Ok, I will PM it to you

 

Thanks everyone for helping, but I realized what the problem was and fixed it... It was a silly typing mistake xD
In the clicking slot 3 in my GUI it would set the STRING to the uuid and true, not the Map... XD
Anyway, thanks everyone for helping as much as you could, it's really appreciated