Перестала работать галерея NextGen

Добрый день, с недавнего времени перестала работать галерея NextGen при включения плагина Advanced Custom Fields: NextGEN Gallery Field add-on, на странице редактирования контента вылазит ошибка

Fatal error: Uncaught Error: Call to undefined method nggdb::find_all_galleries() in /var/www/u2599254/data/www/sunrayhotel.ru/wp-content/plugins/advanced-custom-fields-nextgen-gallery-field-add-on/acf-ngg-v5.php:187 Stack trace: #0 /var/www/u2599254/data/www/sunrayhotel.ru/wp-content/plugins/advanced-custom-fields-nextgen-gallery-field-add-on/acf-ngg-v5.php(257): acf_field_ngg->ngg_get_galleries() #1 /var/www/u2599254/data/www/sunrayhotel.ru/wp-includes/class-wp-hook.php(324): acf_field_ngg->render_field(Array) #2 /var/www/u2599254/data/www/sunrayhotel.ru/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(», Array) #3 /var/www/u2599254/data/www/sunrayhotel.ru/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #4 /var/www/u2599254/data/www/sunrayhotel.ru/wp-content/plugins/advanced-custom-fields/includes/acf-hook-functions.php(113): do_action_ref_array(‘acf/render_fiel…’, Array) #5 /var/www/u2599254/data/www/sunrayhotel.ru/wp-includes/class-wp-hook.php(324): _acf_apply_hook_variations(Array) #6 /var/www/u25 in /var/www/u2599254/data/www/sunrayhotel.ru/wp-content/plugins/advanced-custom-fields-nextgen-gallery-field-add-on/acf-ngg-v5.php on line 187

<?php

class acf_field_ngg extends acf_field {


	/*
	*  __construct
	*
	*  This function will setup the field type data
	*
	*  @type	function
	*  @date	23/11/2014
	*  @since	2.1
	*
	*  @param	n/a
	*  @return	n/a
	*/

	function __construct() {

		// vars
		$this->name = 'ngg';
		$this->label = __('NextGEN Gallery', 'acf-ngg');
		$this->category = 'relational';

		$this->defaults = array(
			'input_type'		=> 'select',
			'allow_null'		=> 1,
			//'input_size'      => 5,
			'multiple'			=> 'select',
			'multiple_size'     => 5,
			'nextgen_type'		=> 'Galleries and Albums',
			'ui'				=> 0,
			'ajax'				=> 0,
			'placeholder'		=> '',
			'disabled'			=> 0,
			'readonly'			=> 0,
		);

		// ajax
		//add_action('wp_ajax_acf/fields/select/query',				array($this, 'ajax_query'));
		//add_action('wp_ajax_nopriv_acf/fields/select/query',		array($this, 'ajax_query'));

		// action
		add_action( 'admin_enqueue_scripts', array($this, 'admin_enqueue_scripts') );

		// do not delete!
    	parent::__construct();

	}


	/*
	*  query_posts
	*
	*  description
	*
	*  @type	function
	*  @date	22/10/14
	*  @since	2.1
	*
	*  @param	n/a
	*  @return	n/a
	*/

	/*

	function ajax_query() {


	}

	*/

	/*
	*  render_field_settings()
	*
	*  Create extra settings for your field. These are visible when editing a field
	*
	*  @type	action
	*  @since	2.1
	*  @date	23/11/14
	*
	*  @param	$field (array) the $field being edited
	*  @return	n/a
	*/

	function render_field_settings( $field ) {

		acf_render_field_setting( $field, array(
			'label'			=> __('Allow Null?', 'acf'),
			'instructions'	=> '',
			'type'			=> 'radio',
			'name'			=> 'allow_null',
			'layout'		=> 'horizontal',
			'choices'		=> array(
						'1' => __( 'Yes' ),
						'0' => __( 'No' )
                  )
		));

		acf_render_field_setting( $field, array(
			'label'			=> __('Nextgen Type'),
			'instructions'	=> 'Allow or restrict the Nextgen selection type.',
			'type'			=> 'select',
			'name'			=> 'nextgen_type',
			'layout'		=> 'horizontal',
			'choices' => array(
                        'Galleries and Albums'	=> __( 'Galleries and Albums' ),
                        'Galleries'				=> __( 'Galleries' ),
                        'Albums'				=> __( 'Albums' )
                  )
		));

		// multiple
		acf_render_field_setting( $field, array(
			'label'			=> __('Select multiple values?', 'acf'),
			'instructions'	=> '',
			'type'			=> 'select',
			//'name'			=> 'input_type',
			'name'			=> 'multiple',
			'class'			=> 'acf-ngg-input-method',
			'layout'		=> 'horizontal',
			'choices' => array(
                        'select'		=> __( 'Select' ),
                        'multiselect'	=> __( 'Multi-Select' )
                  )
		));

		//if ($field['multiple'] == 'multiple') :

			// multiple_size
			acf_render_field_setting( $field, array(
				'label'			=> __('Multi-Select Size'),
				'instructions'	=> 'The number of rows to show at once in a multi-select.',
				'type'			=> 'select',
				//'name'			=> 'input_size',
				'name'			=> 'multiple_size',
				'class'			=> ($field['multiple'] == 'select') ? 'ngg-select' : 'ngg-select',
				'layout'		=> 'horizontal',
				'choices'		=> array_combine( range( 3, 15, 2 ), range( 3, 15, 2 ) )
			));

		//endif;

		// ui
		/*acf_render_field_setting( $field, array(
			'label'			=> __('Stylised UI', 'acf'),
			'instructions'	=> '',
			'type'			=> 'radio',
			'name'			=> 'ui',
			'choices'		=> array(
				1				=> __("Yes",'acf'),
				0				=> __("No",'acf'),
			),
			'layout'	=>	'horizontal',
		));*/


	}

	/*
	*  ngg_get_galleries()
	*
	*  Get all the NextGen/NextCellent Galleries
	*
	*  @type	function
	*  @since	2.1
	*  @date	23/11/14
	*
	*  @param	n/a
	*  @return	array of galleries
	*/

	function ngg_get_galleries() {

		if ( class_exists('nggdb') ) {

	        // Settings of NextGEN Gallery SQL query
	        $limit = 0;
	        $start = 0;
	        $order_by = 'title';
	        $order_dir = 'ASC';
	        $galleries = false;

	        // Seek to all NextGEN Galleries
	        $gallerylist = nggdb::find_all_galleries( $order_by, $order_dir, true, $limit, $start, false);
			return array( $gallerylist );

		}

	}

выше часть кода плагина до 187 строки

на самой станице с галерей пишет — [Not a valid template]

Подскажите а каком направлении копать, Спасибо.