Помогите Как выдать вещи, которые прописаны в конфиге?

Не выходит выдать вещи из конфига, видимо что-то не так делаю:

Код:

    @Override
    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
        if (args.length == 0){
            sender.sendMessage("Plugin Reload");
            return true;
        }
        if (args[0].equalsIgnoreCase("test")){
            Player player = (Player) sender;
            List<String> list = BanPromo.getInstance().getConfig().getStringList("promocodes.test");
            for (String theItem : list){
                player.getInventory().addItem(new ItemStack(Material.matchMaterial(theItem)));
            }
            return true;
        }
        return true;
    }
}

Ошибка в консоли:

Спойлер: Ошибка

[09:42:55 INFO]: BAN_NED issued server command: /cd test
[09:42:55 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'cd' in plugin BanPromo v1.0-SNAPSHOT
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_18_R2.CraftServer.dispatchCommand(CraftServer.java:906) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleCommand(ServerGamePacketListenerImpl.java:2306) ~[?:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:2117) ~[?:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleChat(ServerGamePacketListenerImpl.java:2098) ~[?:?]
at net.minecraft.network.protocol.game.ServerboundChatPacket.handle(ServerboundChatPacket.java:46) ~[?:?]
at net.minecraft.network.protocol.game.ServerboundChatPacket.a(ServerboundChatPacket.java:6) ~[?:?]
at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$1(PacketUtils.java:51) ~[?:?]
at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?]
at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:23) ~[?:?]
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1399) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:188) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?]
at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1376) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1369) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.util.thread.BlockableEventLoop.runAllTasks(BlockableEventLoop.java:114) ~[?:?]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1503) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1225) ~[paper-1.18.2.jar:git-Paper-299]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:315) ~[paper-1.18.2.jar:git-Paper-299]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "banned.banpromo.BanPromo.getConfig()" because the return value of "banned.banpromo.BanPromo.getInstance()" is null
at banned.banpromo.GiveCommand.onCommand(GiveCommand.java:26) ~[BanPromo.jar:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-api-1.18.2-R0.1-SNAPSHOT.jar:?]
... 21 more
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