Custom Type e Novo Taxonomy – Exibir registros apenas da categoria selecionada

Boa tarde!

Criei um register_post_type chamado “downloads” e criei categorias para estas utilizando o register_taxonomy() chamado downloads-category.

No WP-Admin, consegui cadastrar todos meus arquivos e separar eles por categorias. Está funcioando direitinho. Porém, no site, não consegui fazer essa filtragem. Se verem no link que enviei (https://ideia.marfin.co/downloads/), ao clicar em qualquer categoria, nenhum filtro é realizado.

Não sei aonde errei! Podem me ajudar?

functions.php

register_post_type('downloads',
    array(
        'labels' => array(
            'name' => __('Downloads'),
            'featured_image' => __('Imagem Capa'),
            'singular_name' => __('Download'),
        ),
        'taxonomies'  => array('downloads-category'),
        'supports' => array(
        	'title',
        	'editor',
        	'custom-fields',
        	'thumbnail'
        ),
        'menu_icon'   => 'dashicons-category',
        'with_front' => true,
        'public' => true,
        'has_archive' => true,
        'rewrite' => array('slug' => 'downloads'),
    )
);
$labels = array(
	'name' => _x('Categorias', 'taxonomy general name'),
	'singular_name' => _x('Categoria', 'taxonomy singular name'),
	'search_items' =>  __('Procurar categoria'),
	'all_items' => __('Todos'),
	'edit_item' => __('Editar categoria'), 
	'update_item' => __('Editar categoria'),
	'add_new_item' => __('Adicionar categoria'),
	'new_item_name' => __('Nova categoria')
);    
register_taxonomy('downloads-category',array('downloads'), array(
	'hierarchical' => true,
	'labels' => $labels,
	'show_ui' => true,
	'query_var' => true,
	'show_in_nav_menus' => true,
	'rewrite' => array('slug' => 'categoria-de-downloads', 'with_front' => false),
));

archive.php

<?php get_header(); ?>
<?php if(is_post_type_archive('downloads')){ ?>
<section id="conteudo">
    <div class="title">
        <div class="container">
        	<h1>Downloads</h1>
        	<?php if (function_exists('yoast_breadcrumb')){ yoast_breadcrumb('<p id="breadcrumbs">','</p>'); }?>
        </div>
    </div>
    <div class="content-master">
    	<div class="container">
    		<div class="row more-gutter">
    			<aside class="col-sm-3">
    				<?php

    					$args = array(
						    'orderby' => 'name',
						    'taxonomy'=>'downloads-category',
						    'parent' => 0
						);
						$categories = get_categories($args);
						foreach ($categories as $category){
						    echo '<li><a href="'.get_category_link($category->term_id).'">'.$category->name.'</a></li>';
						}

    				?>
    			</aside>
    			<div class="col-sm-9">
    				<?php 
    					$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
						$infoDownload = array(
							'post_type' => 'downloads', 
							'paged' => $paged
						);
						$resultadoDownload = new WP_Query($infoDownload); 
						if ($resultadoDownload->have_posts()) :
						while ($resultadoDownload->have_posts()) : $resultadoDownload->the_post();
							$postThumb = (has_post_thumbnail()) ? get_the_post_thumbnail_url() : get_stylesheet_directory_uri()."/img/layout/sem-imagem.jpg";
							$postThumb = "<img src=\"".$postThumb."\" class=\"img-fluid\">";
						?>
			    		<div class="row lista-download">
			    			<div class="col-sm-4">
								<?php echo $postThumb; ?>
							</div>
							<div class="col-sm-8">
								<h3><?php the_title() ?></h3>
								<?php the_content(); ?>
							</div>
						</div>
		        	<?php 
						wp_reset_postdata();
						endwhile;
						wpbs_pagination();
						endif;
					?>
    			</div>
    		</div>
    	</div>
    </div>
</section>
<?php }elseif(is_tax('downloads-category')){ ?>
<section id="conteudo">
    <div class="title">
        <div class="container">
        	<h1>Nome da categoria</h1>
        	<?php if (function_exists('yoast_breadcrumb')){ yoast_breadcrumb('<p id="breadcrumbs">','</p>'); }?>
        </div>
    </div>
    <div class="content-master">
    	<div class="container">
    		<div class="row more-gutter">
    			<aside class="col-sm-3">
    				<?php

    					$args = array(
						    'orderby' => 'name',
						    'taxonomy'=>'downloads-category',
						    'parent' => 0
						);
						$categories = get_categories($args);
						foreach ($categories as $category){
						    echo '<li><a href="'.get_category_link($category->term_id).'">'.$category->name.'</a></li>';
						}

    				?>
    			</aside>
    			<div class="col-sm-9">
    				<?php 
    					$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
						$infoDownload = array(
							'post_type' => 'downloads',
							'tax_query' => array(
						        array(
						            'taxonomy'=>'downloads-category',
						            'field'    => 'slug'
						        )
						    ),
							'paged' => $paged
						);
						$resultadoDownload = new WP_Query($infoDownload); 
						if ($resultadoDownload->have_posts()) :
						while ($resultadoDownload->have_posts()) : $resultadoDownload->the_post();
							$postThumb = (has_post_thumbnail()) ? get_the_post_thumbnail_url() : get_stylesheet_directory_uri()."/img/layout/sem-imagem.jpg";
							$postThumb = "<img src=\"".$postThumb."\" class=\"img-fluid\">";
						?>
			    		<div class="row lista-download">
			    			<div class="col-sm-4">
								<?php echo $postThumb; ?>
							</div>
							<div class="col-sm-8">
								<h3><?php the_title() ?></h3>
								<?php the_content(); ?>
							</div>
						</div>
		        	<?php 
						wp_reset_postdata();
						endwhile;
						wpbs_pagination();
						endif;
					?>
    			</div>
    		</div>
    	</div>
    </div>
</section>
<?php get_footer(); ?>

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