problem with blog post element and read more tag

Hey regehernanski,
Sorry for the late reply, when a post has been created with the Advanced Layout Builder the except will need to be added manually in the “Rédiger un extrait (facultatif)” field. The “read more” tag will not work in this situation.
So to use these options we would advise using the standard editor for your posts.
From looking at your post layout it looks like you wanted to have the featured image as a full-width image above the post, and perhaps this is why you want to use the ALB, but this can be achieved with jQuery, from this:

to this:

For this example I used this code to the end of the functions.php file in Appearance > Editor:

function custom_script(){
  ?>
  <script>
(function($) {
  $(document).ready(function(){
     $('.single-post .big-preview.single-big').css({ 'max-height': '400px'}).detach().insertBefore('.container_wrap_first');
     $('.single-post .big-preview.single-big a').css({ 'max-height': '400px'});
  });
 })(jQuery);
 </script>
<?php
}
add_action('wp_footer', 'custom_script');

Perhaps this will help.

Best regards,
Mike

Hi,
Glad to hear, we will keep this open until we hear back from you.

Best regards,
Mike