Why does it display a template page instead of links when viewing media files (pictures)?

Question

WordPress

Hello!
For some reason, when viewing a media file on my site, instead of a link to the file, it leads to a template page along the path
wp-includes\post-template.php
and is formed in this way

$p = '<p class="attachment">';
// Show the medium sized image representation of the attachment if available, and link to the raw file.
$p .= wp_get_attachment_link( 0, 'medium', false );
$p .= '</p>';

How can I fix it so that by default when viewing pictures, a link to a file is displayed, and not a page template?

Answer 1

The reason is obvious wp_get_attachment_link

Retrieve an attachment page link using an image or icon, if possible.

wp_get_attachment_image_url