The theme seems to load index.php for search pages also. Do you have search.php in your theme?
Did you change anything in the theme?
Also try switching to the Twenty Seventeen theme to check whether it’s the issue with the theme.
as far as I’m aware, nothing has been changed other than visual elements in page builders.
this is what I have in search.php
<?php get_header(); ?>
<div class=”gdlr-content”>
<?php
global $gdlr_sidebar, $theme_option;
$gdlr_sidebar = array(
‘type’=>$theme_option[‘archive-sidebar-template’],
‘left-sidebar’=>$theme_option[‘archive-sidebar-left’],
‘right-sidebar’=>$theme_option[‘archive-sidebar-right’]
);
$gdlr_sidebar = gdlr_get_sidebar_class($gdlr_sidebar);
?>
<div class=”with-sidebar-wrapper”>
<div class=”with-sidebar-container container”>
<div class=”with-sidebar-left <?php echo esc_attr($gdlr_sidebar[‘outer’]); ?> columns”>
<div class=”with-sidebar-content <?php echo esc_attr($gdlr_sidebar[‘center’]); ?> gdlr-item-start-content columns”>
<?php
if( have_posts() ){
// set the excerpt length
if( !empty($theme_option[‘archive-num-excerpt’]) ){
global $gdlr_excerpt_length; $gdlr_excerpt_length = $theme_option[‘archive-num-excerpt’];
add_filter(‘excerpt_length’, ‘gdlr_set_excerpt_length’);
}
global $wp_query, $gdlr_post_settings;
$gdlr_lightbox_id++;
$gdlr_post_settings[‘excerpt’] = intval($theme_option[‘archive-num-excerpt’]);
$gdlr_post_settings[‘thumbnail-size’] = $theme_option[‘archive-thumbnail-size’];
$gdlr_post_settings[‘blog-style’] = $theme_option[‘archive-blog-style’];
echo ‘<div class=”blog-item-holder”>’;
if($theme_option[‘archive-blog-style’] == ‘blog-full’){
echo gdlr_get_blog_full($wp_query);
}else if($theme_option[‘archive-blog-style’] == ‘blog-medium’){
echo gdlr_get_blog_medium($wp_query);
}else{
$blog_size = str_replace(‘blog-1-‘, ”, $theme_option[‘archive-blog-style’]);
echo gdlr_get_blog_grid($wp_query, $blog_size, ‘fitRows’);
}
echo ‘</div>’;
remove_filter(‘excerpt_length’, ‘gdlr_set_excerpt_length’);
$paged = (get_query_var(‘paged’))? get_query_var(‘paged’) : 1;
echo gdlr_get_pagination($wp_query->max_num_pages, $paged);
}else{
?>
<div class=”gdlr-item page-not-found-item”>
<div class=”page-not-found-block” >
<div class=”page-not-found-icon”>
<?php if( !empty($theme_option[‘new-fontawesome’]) && $theme_option[‘new-fontawesome’] == ‘enable’ ){ ?>
<i class=”fa fa-frown-o”></i>
<?php }else{ ?>
<i class=”icon-frown”></i>
<?php } ?>
</div>
<div class=”page-not-found-title”>
<?php _e(‘Not Found’, ‘gdlr_translate’); ?>
</div>
<div class=”page-not-found-caption”>
<?php _e(‘Nothing matched your search criteria. Please try again with different keywords.’, ‘gdlr_translate’); ?>
</div>
<div class=”page-not-found-search”>
<?php get_search_form(); ?>
</div>
</div>
</div>
<?php
}
?>
</div>
<?php get_sidebar(‘left’); ?>
<div class=”clear”></div>
</div>
<?php get_sidebar(‘right’); ?>
<div class=”clear”></div>
</div>
</div>
</div><!– gdlr-content –>
<?php get_footer(); ?>
