Help using bevy_ecs_tilemap

[sigten]

I am an amateur coder and could really use some help! I am using Bevy (0.5) and bevy_ecs_tilemap (main) and attempting to spawn a dummy map (using my assets) by copying code almost verbatim from here. I am getting this error:

thread 'main' panicked at 'called Option::unwrap() on a None value', C:\Users\Me.cargo\registry\src\github.com-1ecc6299db9ec823\bevy_render-0.5.0\src\pipeline\pipeline_compiler.rs:137:64
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
Dec 05 11:58:21.225 ERROR gpu_descriptor::allocator: DescriptorAllocator is dropped while some descriptor sets were not deallocated
error: process didn't exit successfully: target\debug\my_game.exe (exit code: 0xc000041d)

I have tried cloning the repo and running the example directly and it works fine. Here is the relevant function in my code:

fn create_map(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut materials: ResMut<Assets<ColorMaterial>>,
    current_level: Res<CurrentLevel>,
    mut map_query: MapQuery,
) {
    let mut filepath = PathBuf::new();
    let mut spritesheet_rows = 0.0;
    let mut spritesheet_columns = 0.0;

    match current_level.0 {
        Some(LevelSelection::Game1) => {
            filepath.push("game_1/sprites.png");
            spritesheet_rows = GAME_1_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_1_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game2) => {
            filepath.push("game_2/sprites.png");
            spritesheet_rows = GAME_2_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_2_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game3) => {
            filepath.push("game_3/sprites.png");
            spritesheet_rows = GAME_3_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_3_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game4) => {
            filepath.push("game_4/sprites.png");
            spritesheet_rows = GAME_4_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_4_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game5) => {
            filepath.push("game_5/sprites.png");
            spritesheet_rows = GAME_5_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_5_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game6) => {
            filepath.push("game_6/sprites.png");
            spritesheet_rows = GAME_6_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_6_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game7) => {
            filepath.push("game_7/sprites.png");
            spritesheet_rows = GAME_7_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_7_SPRITESHEET_COLUMNS;
        }
        Some(LevelSelection::Game8) => {
            filepath.push("game_8/sprites.png");
            spritesheet_rows = GAME_8_SPRITESHEET_ROWS;
            spritesheet_columns = GAME_8_SPRITESHEET_COLUMNS;
        }
        None => {
            panic!("Tried to load a map without a level selected.")
        }
    }

    let texture_handle = asset_server.load(filepath);
    let material_handle = materials.add(ColorMaterial::texture(texture_handle));

    let map_entity = commands.spawn().id();
    let mut map = Map::new(0u16, map_entity);

    let (mut layer_builder, _) = LayerBuilder::new(
        &mut commands,
        LayerSettings::new(
            MapSize(2, 2),
            ChunkSize(8, 8),
            TileSize(SPRITE_SIZE_X, SPRITE_SIZE_Y),
            TextureSize(
                SPRITE_SIZE_X * spritesheet_columns,
                SPRITE_SIZE_Y * spritesheet_rows,
            ),
        ),
        0u16,
        0u16,
        None,
    );

    layer_builder.set_all(TileBundle::default());

    let layer_entity = map_query.build_layer(&mut commands, layer_builder, material_handle);

    map.add_layer(&mut commands, 0u16, layer_entity);

    commands
        .entity(map_entity)
        .insert(map)
        .insert(Transform::from_xyz(0.0, 0.0, 0.0))
        .insert(GlobalTransform::default());
}

The crash appears to occur at this line:
let layer_entity = map_query.build_layer(&mut commands, layer_builder, material_handle);

Thank you for taking the time to read this. I apologize in advance for mistakes/lack of clarity. If you have some thoughts, I would certainly appreciate the help!