post-blog-pagination.php

<?php 
  /**
   * Template Name: Blog
   */
  get_header(); 
?>

	<main id="main" class="site-main innerPage">
    <section class="banner-innerPage" style="background-image: url(<?php echo get_template_directory_uri(); ?>/assets/images/banner-conteudo.jpg)">
      <div class="container text-center">
        <?php 
          the_title('<h1>', '</h1>'); 
        ?>
      </div>
    </section>

    <section class="section-conteudo">
      <div class="container">
        <div class="row">
          <?php 
            $args_blog = array(
              'post_type' => 'post',
              'posts_per_page' => 8,
              'paged' => get_query_var('paged') ? get_query_var('paged') : 1
            );
            $query_blog = new WP_Query( $args_blog );

            if( $query_blog->have_posts() ) :
              while( $query_blog->have_posts() ) : $query_blog->the_post();
          ?>
            <div class="col-md-4">
              <div class="item-noticia">
                <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" class="d-block">
                  <img src="<?php the_post_thumbnail_url('post-blog'); ?>" alt="<?php the_title(); ?>" class="img-fluid">
                </a>
                <div class="box-inner">
                  <span class="cat"><?php the_category(); ?></span>
                  <?php 
                    // Título
                    the_title('<h3>','</h3>'); 

                    // Data
                    echo '<span><i class="fas fa-calendar-check"></i> '. get_the_date('d/m/Y') .'</span>';

                    $excerpt = get_the_content();
                    echo string_limit_words($excerpt, 18) .' [...]';
                  ?>
                  <p><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" class="btn btn-yellow">Leia mais</a></p>
                </div>
              </div>
            </div>
          <?php
              endwhile;
            endif;

            echo '<div class="pagination">';
            $big = 999999999; // need an unlikely integer
            echo paginate_links( array(
              'base' 		=> str_replace( $big, '%#%', get_pagenum_link( $big ) ),
              'format' 	=> '?paged=%#%',
              'current' => max( 1, get_query_var('paged') ),
              'total' 	=> $query_case->max_num_pages
            ) );
            echo '</div>';

            wp_reset_query();
          ?>
        </div>
      </div>
    </section>
	</main>

<?php
get_footer();