LibGDX having trouble with tiled maps

So I’ve recently began to learn how to use LibGDX and I’m now trying to load a tiled map. I’ve been reading this.

So I have my TMX file located at assets/maps/tilemapxml.tmx along with the .png and .pack files. I’m trying to load it via the AssetManager, using this code:

AssetManager manager = new AssetManager();
manager.setLoader(TiledMap.class, new TmxMapLoader(
		new InternalFileHandleResolver()));
manager.load(mapFile, TiledMap.class);
manager.finishLoading();

map = manager.get(mapFile);

Then I’m trying to render the map how it says to:

new OrthogonalTiledMapRenderer(map, unitScale);

But I get a lot of errors like so;

Couldn't load dependencies of asset: maps/tilemapxml.tmx
Error parsing file: maps/tilemapxml.tmx

Q1: Am I doing anything wrong at the moment??
Q2: I’m confused and I feel like I’m missing a lot of code here. What else do I need to do?