CompoundTag .get method returning null with valid key

[p1gyy]

i am trying to get the LevelName from a level.dat file but whenever I try to do that it always returns null

CompoundTag namedTag = (CompoundTag)NBTUtil.read(levelDat).getTag();
this.WORLD_NAME = namedTag.getStringTag("LevelName").getValue();

LOGGER.info(WORLD_NAME);

Caused by: java.lang.NullPointerException: Cannot invoke "net.querz.nbt.tag.StringTag.getValue()" because the return value of "net.querz.nbt.tag.CompoundTag.getStringTag(String)" is null