Website totally crashed after Theme-Update

Hi
after i updated your theme the layout is completly crashed.
Examples:
– What has been a gallery with miniatures before is now one long row of big images below each other.
-Lightboxes dont work anymore
-The whole layout structure is foobar!
If i look in the backend everything looks fine, the ALB shows everything as its supposed to be, but the output in the frontend is horrible.
Please check at first if there is something in our childthemes functions.php which maybe doesnt work anymore and which could cause that conflict.
The problem arises only on pages that uses a custom post type. The developer of the plugin says its a theme issue

Here it is:

<?php
//$avia_config['imgSize']['square-custom'] = array('width'=>300, 'height'=>300); // small image for blogs
//$avia_config['imgSize']['square2'] = array('width'=>400, 'height'=>400); // small image for blogs
/*
* Add your own functions here. You can also copy some of the theme functions into this file. 
* WordPress will use those functions instead of the original functions then.
*/
function enqueue_parent_theme_style() {
      wp_enqueue_style( 'parent-style', get_template_directory_uri().'/style.css' );
}
add_action( 'wp_enqueue_scripts', 'enqueue_parent_theme_style');

/* Proper way to enqueue styles and scripts
 */
function theme_name_scripts() {
	wp_enqueue_style( 'style-name', get_stylesheet_uri() );
}
add_action( 'wp_enqueue_scripts', 'theme_name_scripts' );

/* Activate Avia debug mode */
add_action('avia_builder_mode', "builder_set_debug");
function builder_set_debug()
{
	return "debug";
}
add_filter('avf_builder_boxes', 'add_builder_to_posttype');

function add_builder_to_posttype($metabox)
{
	foreach($metabox as &$meta)
	{
		if($meta['id'] == 'avia_builder' || $meta['id'] == 'layout')
		{
			$meta['page'][] = 'angebot'; /*instead add the name of the custom post type here*/
			$meta['page'][] = 'bild-des-tages'; /*instead add the name of the custom post type here*/
		}
	}
	

	return $metabox;
}
add_filter('avf_blog_style','avia_change_category_blog_layout', 10, 2); 
function avia_change_category_blog_layout($layout, $context){
if($context == 'archive') $layout = 'blog-grid';
return $layout;
}
add_filter('avf_blog_style','avia_change_tag_blog_layout', 10, 2); 
function avia_change_tag_blog_layout($layout, $context){
if($context == 'tag') $layout = 'blog-grid';
return $layout;
}
/* Länge des Auszug auf Blogseite */
add_filter('avf_postgrid_excerpt_length','avia_change_postgrid_excerpt_length', 10, 1);
function avia_change_postgrid_excerpt_length($length)
{
   $length = 100;
   return $length;
}
/* Doppelten Breadcrumb entfernt */
add_filter( 'avia_breadcrumbs_trail', 'mmx_remove_element_from_trail', 50, 2 );
function mmx_remove_element_from_trail( $trail, $args ) {
	if ( is_single() ) {
		unset ($trail[2]);
	}
	return $trail;
} 
add_filter('avf_form_use_wpmail', 'avia_change_php_mail', 10, 3);
function avia_change_php_mail($active, $new_post, $form_params){
return true;
}
add_theme_support('avia_template_builder_custom_css');

add_filter('avf_logo_subtext', 'kriesi_logo_addition');
function kriesi_logo_addition($sub)
{
	$sub .= "<div id='headText'>
					<a href='http://www.maskenzauber.com'><h1>Venezianische<span> Masken</span></h1></a>
					<span id='subslogan'>und Headdresses</span>
				</div>";
	$sub .= "<div id='headClaim'>
				<strong>Hier kommt</strong>
					eine Unterzeile hin
				</div>";
	return $sub;
}
add_filter('avf_title_args','fotos_remove_bc');

function fotos_remove_bc($args){

    if(is_single() && 'post' == get_post_type())
    {
        $args['breadcrumb'] = false;
    }
    return $args;
}
add_filter('avf_title_args','fotosangebot_remove_bc');

function fotosangebot_remove_bc($args){

    if(is_single() && 'angebot' == get_post_type())
    {
        $args['breadcrumb'] = false;
    }
    return $args;
}
//entfernt den Kommentarblock und die Datumsangaben aus dem Combo Widget  // 

class avia_combo_widget extends WP_Widget {

		function avia_combo_widget() {
			//Constructor
			$widget_ops = array('classname' => 'avia_combo_widget', 'description' => 'A widget that displays your popular posts, recent posts, recent comments and a tagcloud' );
			$this->WP_Widget( 'avia_combo_widget', THEMENAME.' Combo Widget', $widget_ops );
		}

		function widget($args, $instance)
		{
			// prints the widget

			extract($args, EXTR_SKIP);
			$posts = empty($instance['count']) ? 4 : $instance['count'];

			echo $before_widget;
			echo "<div class='tabcontainer border_tabs top_tab tab_initial_open tab_initial_open__1'>";

			echo '<div class="tab first_tab active_tab widget_tab_popular"><span>'.__('Popular', 'avia_framework').'</span></div>';
			echo "<div class='tab_content active_tab_content'>";
			avia_get_post_list('cat=&orderby=comment_count&posts_per_page='.$posts);
			echo "</div>";

			echo '<div class="tab widget_tab_recent"><span>'.__('Recent', 'avia_framework').'</span></div>';
			echo "<div class='tab_content'>";
			avia_get_post_list('showposts='. $posts .'&orderby=post_date&order=desc');
			echo "</div>";

			echo '<div class="tab last_tab widget_tab_tags"><span>'.__('Tags', 'avia_framework').'</span></div>';
			echo "<div class='tab_content tagcloud'>";
			wp_tag_cloud('smallest=12&largest=12&unit=px');
			echo "</div>";

			echo "</div>";
			echo $after_widget;
		}

		function update($new_instance, $old_instance)
		{
			$instance = $old_instance;
			foreach($new_instance as $key=>$value)
			{
				$instance[$key]	= strip_tags($new_instance[$key]);
			}

			return $instance;
		}

		function form($instance) {
			//widgetform in backend

			$instance = wp_parse_args( (array) $instance, array('count' => 4) );
			if(!is_numeric($instance['count'])) $instance['count'] = 4;

	?>
			<p>
			<label for="<?php echo $this->get_field_id('count'); ?>">Number of posts you want to display:
			<input class="widefat" id="<?php echo $this->get_field_id('count'); ?>" name="<?php echo $this->get_field_name('count'); ?>" type="text" value="<?php echo esc_attr($instance['count']); ?>" /></label></p>

		<?php
		}
	}
	
	
	function avia_get_post_list( $avia_new_query , $excerpt = false)
	{
		global $avia_config;
		$image_size = isset($avia_config['widget_image_size']) ? $avia_config['widget_image_size'] : 'widget';
		$additional_loop = new WP_Query($avia_new_query);

		if($additional_loop->have_posts()) :
		echo '<ul class="news-wrap">';
		while ($additional_loop->have_posts()) : $additional_loop->the_post();

		$format = "";
		if(get_post_type() != 'post') 		$format = get_post_type();
		if(empty($format)) 					$format = get_post_format();
     	if(empty($format)) 					$format = 'standard';

		echo '<li class="news-content post-format-'.$format.'">';

		//check for preview images:
		$image = "";

		if(!current_theme_supports('force-post-thumbnails-in-widget'))
			{
			$slides = avia_post_meta(get_the_ID(), 'slideshow');

			if( $slides != "" && !empty( $slides[0]['slideshow_image'] ) )
			{
				$image = avia_image_by_id($slides[0]['slideshow_image'], 'widget', 'image');
			}
		}

		if(!$image && current_theme_supports( 'post-thumbnails' ))
		{
			$image = get_the_post_thumbnail( get_the_ID(), $image_size );
		}

		$time_format = apply_filters( 'avia_widget_time', get_option('date_format')." - ".get_option('time_format'), 'avia_get_post_list' );

		$nothumb = (!$image) ? 'no-news-thumb' : '';

		echo "<a class='news-link' title='".get_the_title()."' href='".get_permalink()."'>";
		echo "<span class='news-thumb $nothumb'>";
		echo $image;
		echo "</span>";
		echo "<strong class='news-headline'>".avia_backend_truncate(get_the_title(), 55," ");
		//echo "<span class='news-time'>".get_the_time($time_format)."</span>";
		echo "</strong>";
		echo "</a>";

		if('display title and excerpt' == $excerpt)
		{
			echo "<div class='news-excerpt'>";
			the_excerpt();
			echo "</div>";
		}

		echo '</li>';

		endwhile;
		echo "</ul>";
		wp_reset_postdata();
		endif;
	}
//erzeugt Next / Preview Links in Blogposts auch bei Verwendung von Fullwidth-Slider //
	if(!function_exists('avia_post_nav'))
{
	function avia_post_nav($same_category = false, $taxonomy = 'category')
	{
		global $wp_version;
	        $settings = array();
	        $settings['same_category'] = $same_category;
	        $settings['excluded_terms'] = '';
			$settings['wpversion'] = $wp_version;

		$settings['type'] = get_post_type();
		$settings['taxonomy'] = ($settings['type'] == 'portfolio') ? 'portfolio_entries' : $taxonomy;

		if(!is_singular() || is_post_type_hierarchical($settings['type'])) $settings['is_hierarchical'] = true;
		if($settings['type'] === 'topic' || $settings['type'] === 'reply') $settings['is_bbpress'] = true;

	        $settings = apply_filters('avia_post_nav_settings', $settings);
	        if(!empty($settings['is_bbpress']) || !empty($settings['is_hierarchical']) || !empty($settings['is_fullwidth'])) return;
	
	        if(version_compare($settings['wpversion'], '3.8', '>=' ))
	        {
	            $entries['prev'] = get_previous_post($settings['same_category'], $settings['excluded_terms'], $settings['taxonomy']);
	            $entries['next'] = get_next_post($settings['same_category'], $settings['excluded_terms'], $settings['taxonomy']);
	        }
	        else
	        {
	            $entries['prev'] = get_previous_post($settings['same_category']);
	            $entries['next'] = get_next_post($settings['same_category']);
	        }
	        
		$entries = apply_filters('avia_post_nav_entries', $entries, $settings);
        $output = "";

		foreach ($entries as $key => $entry)
		{
            if(empty($entry)) continue;
			$the_title 	= isset($entry->av_custom_title) ? $entry->av_custom_title : avia_backend_truncate(get_the_title($entry->ID),75," ");
			$link 		= isset($entry->av_custom_link)  ? $entry->av_custom_link  : get_permalink($entry->ID);
			$image 		= isset($entry->av_custom_image) ? $entry->av_custom_image : get_the_post_thumbnail($entry->ID, 'thumbnail');
			
            $tc1   = $tc2 = "";
            $class = $image ? "with-image" : "without-image";

            $output .= "<a class='avia-post-nav avia-post-{$key} {$class}' href='{$link}' >";
		    $output .= "    <span class='label iconfont' ".av_icon_string($key)."></span>";
		    $output .= "    <span class='entry-info-wrap'>";
		    $output .= "        <span class='entry-info'>";
		    $tc1     = "            <span class='entry-title'>{$the_title}</span>";
if($image)  $tc2     = "            <span class='entry-image'>{$image}</span>";
            $output .= $key == 'prev' ?  $tc1.$tc2 : $tc2.$tc1;
            $output .= "        </span>";
            $output .= "    </span>";
		    $output .= "</a>";
		}
		return $output;
	}
}
	add_filter('avf_debugging_info', 'remove_debugging_info', $info);

function remove_debugging_info($info) {
$info = '';
return $info;
}

remove_action( 'init', 'cptui_create_custom_post_types', 10 );
add_action( 'init', 'cptui_create_custom_post_types', 11 );
// Nach Dateinamen in der Mediathek suchen
function posts_search_media_filenames($search, $a_wp_query) 
{
    global $wpdb, $pagenow;

    // Only Admin side && Only Media Library page
    if ( !is_admin() && 'upload.php' != $pagenow ) return $search;

    // Original search string:
    // AND (((wp_posts.post_title LIKE '%search-string%') OR (wp_posts.post_content LIKE '%search-string%')))
    $search = str_replace(
        'AND ((', 
        'AND (((' . $wpdb->prefix . 'posts.guid LIKE \'%' . $a_wp_query->query_vars['s'] . '%\') OR ', 
        $search
    ); 

    return $search;
}
add_filter('posts_search', 'posts_search_media_filenames', 10, 2);
// Sortiert alle Bilder in der masonry-Galerie nach Zufall
add_filter('avia_masonry_entries_query', 'avia_random_image_query', 10, 2);
function avia_random_image_query($query, $params)
{
    if(!empty($query['post_mime_type']) && $query['post_mime_type'] == 'image')
    {
        $query['orderby'] = "rand";
    }

    return $query;
}
function remove_avia_search(){
    remove_filter( 'wp_nav_menu_items', 'avia_append_search_nav', 10, 2 );
}
add_action( 'init' , 'remove_avia_search' );
add_filter( 'avf_main_menu_nav' , 'um_enfold_menu' , 100 , 1 );
function um_enfold_menu( $menu ){
  $menu = ubermenu( 'main' , array( 'theme_location' => 'avia' , 'echo' => false ) );
  return $menu;
}
add_image_size( 'my-ubermenu-image-size', 100, 100, true );