Image don’t View

I created a custom field, named bg_article_home.
I applied a rule that says this post must show when post taxonomy equals in_evidence.
Then I went into the article and uploaded an image.
In the backend I have tried all the documentation code but I don’t understand what I’m doing wrong.
The code I have now put:

`<!– Pre-Article Home –>
<section class=”mt-5″ id=”pre-article-home”>

<div class=”container pre_article_home_container”>
<div class=”row align-items-center”>

<?php

$args = array(
‘post_type’ => ‘post’,
‘tag’ => ‘in_evidenza’,
‘posts_per_page’ => 1
);

// The Query
$kaos_home_news_tag = new WP_Query( $args );

//The loop
while ($kaos_home_news_tag->have_posts() ) : $kaos_home_news_tag->the_post();

?>

<div class=”col-4 pre_article_home_container-left “>
<h6> <?php the_category(); ?> </p>
<h4> <?php the_title(); ?> </h4>
” class=”text_continua”>Continua
</div>

<div class=”col-8 pre_article_home_container-right “>
<div class=”bg_right”>

” alt=””>

</div>
<div class=”img_right”>
<?php the_post_thumbnail( ‘kaos_big’, array(‘class’ => ‘img-fluid’, ‘alt’ => get_the_title()) ) ?>
</div>
</div>

<?php

endwhile;

wp_reset_query();
wp_reset_postdata();

?>

</div>

</div>

</section>
<!– END-Pre-Article Home –>’