Why it doesn't work

Might be because you have the shortcode inside a loop.
Try this instead.

<div class="container-fluid block-posts">
<div class="content">
<div class="row">
<?php
echo do_shortcode("[ajax_load_more]");
?>
</div>
</div>
</div>

try without
nothing changed

can you share more details please…
a link maybe?

<div class="col-xs-12 col-sm-6 col-md-4">
                                    <div id="load-content" class="post-preview fadeIn wow animated" data-wow-delay="200ms" style="visibility: visible; animation-delay: 200ms; animation-name: fadeIn;">
                                        <?the_post_thumbnail('thumbnail')?>

                                            <div class="text-box">
                                                <p class="title">
                                                    <a href="<? echo get_permalink()?>">
                                                        <?php the_title()?>
                                                    </a>
                                                </p>

                                                <p class="text">
                                                    <?php echo get_the_excerpt()?>
                                                </p>
                                                <a href="<? echo get_permalink()?>" class="button-read">Read</a>
                                            </div>

                                    </div>
                                </div>

It is Default Template
and this code was in loop before

it’s on a localserver, sorry, what info you need?

Can you confirm the ajax load more js is on the page?

If it’s not returning any results than you either:

1. have no posts
2. set it up incorrectly.

https://take.ms/2Gpee – it is what creates
i have 7 posts

must be a javascript issue then. without being able to view your site I can’t really help other than what I’ve already covered.

Did you confirm the ajax load more js is on the page?

where i can check it?
sorry i am noob

Look near the footer of your page.

ajax-load-more.min.js

there is no

Ok then you need to add <?php wp_footer(); ?> to your footer.php file

add <?php wp_footer(); ?> to the footer.php
but nothing change https://take.ms/hHNNU

Then Im not sure… sorry about that.

maybe something in config
my task:
make load more button that will be load more preview posts
i add code, that was in loop to template
i add shortcode to index.php
but when i add it with more arguments

<?php
                    echo do_shortcode("[ajax_load_more post_type="post, page" pause="true"]");
                    ?>

Error:
Parse error: syntax error, unexpected T_STRING