starfix

I also tried to do these tips:
– I de-activated all the plugins
– I changed the theme to a twenty-sixteen basic theme.
– I deleted the website after a backup and re-installed wordpress (with softacolous) and database

The problem is still there.

as I said in my former comment I tried to migrate to another server for a test and the there is no problem in this server

I called the hosting help center, he tried to comment and it’s worked perfectly!

So the problem ins’t for everyone.
How can I do?

Thank you in advance for you help

I solved the issue inserting the images in a div…

I publish the changed code so it could be useful for someone.

$attachments = get_posts( $args );
if ( $attachments ) {
foreach ( $attachments as $attachment ) {
echo '
<li>';
echo '<div class="imagebox">';
echo the_attachment_link( $attachment->ID, 'thumbnail', false );
echo '</div>';
echo '<p class="small-title">';
echo apply_filters( 'the_title', $attachment->post_title );
echo '</p></li>
';

[Moderator note: Please post code between backticks]

maybe i have to recall the loop in some other way?
Here is my single.php loop:

` <div class="five columns">
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<h3 class="series">
<?php the_title(); ?>
</h3>
<?php print_excerpt(5000); ?> </div>
<?php endwhile; endif; ?>
<div class="padding20" />
</div>
<div class="settimo">
<ul class="cornice">
<?php
$args = array(
'post_type' => 'attachment',
'numberposts' => -1,
'post_status' => null,
'exclude' => get_post_thumbnail_id( $post->ID ),
'post_parent' => $post->ID
);

$attachments = get_posts( $args );
if ( $attachments ) {
foreach ( $attachments as $attachment ) {
echo '<li>';
echo the_attachment_link( $attachment->ID, 'thumbnail', false );
echo '<p class="small-title">';
echo apply_filters( 'the_title', $attachment->post_title );
echo '</p></li>';
}
}
wp_reset_postdata(); ?>
</ul>
</div>`