Fatal error on loop.php

// $global_flag_to_hide_no_post_to_display - comes from page-category-big-grid.php and is a flag to hide the 'No posts to display' message if on category page there are between 1 and 5 posts
global $loop_module_id, $loop_sidebar_position, $global_flag_to_hide_no_post_to_display;

///if we are in wordpress loop; used by quotes in blocks to check if the blocks are displayed in blocks or in loop
td_global::$is_wordpress_loop = true;

$td_template_layout = new td_template_layout($loop_sidebar_position);

if (empty($loop_module_id)) { //not sure if we need a default here
$loop_module_id = 1;
}

$td_module_class = td_api_module::_helper_get_module_class_from_loop_id($loop_module_id);

//disable the grid for some of the modules
$td_module_api = td_api_module::get_by_id($td_module_class);
if ($td_module_api['uses_columns'] === false) {
$td_template_layout->disable_output();
}

if (have_posts()) {
while ( have_posts() ) : the_post();
echo $td_template_layout->layout_open_element();

if (class_exists($td_module_class)) {
$td_mod = new $td_module_class($post);
echo $td_mod->render();
} else {
td_util::error(__FILE__, 'Missing module: ' . $td_module_class);
}

echo $td_template_layout->layout_close_element();
$td_template_layout->layout_next();
endwhile; //end loop
echo $td_template_layout->close_all_tags();

} else {
/**
* no posts to display. This function generates the __td('No posts to display').
* the text can be overwritten by the themplate using the global @see td_global::$custom_no_posts_message
*/