быть c критической проблемы, плагин не может быть запущен (ошибка синтаксического анализа: синтаксическая ошибка, неожиданный 'include' (T_IN

Question

Я пытаюсь включить плагин для моего веб-сайта WP, который включает jalili/shamsi datepicker, и он устанавливает плагин, но поскольку я хочу сделать его активным, он отрицает это:

Parse error: syntax error, unexpected 'include' (T_INCLUDE), expecting identifier (T_STRING) in /home/halagard/public_html/wp-content/plugins/daterangepicker-ariawp/class-ariawp-ajax.php on line 29

Здесь это файл, который упоминается в ошибке:

<?php 
    namespace Ariawp\Traveler\DateTime;

    use \Morilog\Jalali\Jalalian  as Jalalian;
    use \Morilog\Jalali\CalendarUtils as CalendarUtils;

    if( !class_exists("AriawpAjAx") ){
        class AriawpAjAx {

            const VERESION = '1.0.1';

            /**
             * @var object of AriawpAjax
            */
            protected static $instance = null;
            /**
             * @return object AriawpAjax
            */
            public static  function getInstance(){
                if( is_null( self::$instance ) )
                    self::$instance = new self();
                return self::$instance;
            }
            protected function __construct(){
                $this->include();
                $this->hook();

            }
            protected function include(){
                // include the file we need it

            }
            public function hook(){
                /**
                 * Description : Editing the st_get_info_booking_history ajax method 
                 * Step1: Remove All Action That Acting on this hook
                 * Step2: Hook new function for edit the DateElement 
                */
                add_action("wp_ajax_st_get_info_booking_history", array($this,"hookStGetInfoBookingHistory"),-999);
                add_action("wp_ajax_nopriv_st_get_info_booking_history", array($this,"hookStGetInfoBookingHistory"),-999);

            }
            public function hookStGetInfoBookingHistory(){
                remove_all_actions("wp_ajax_st_get_info_booking_history");
                remove_all_actions("wp_ajax_nopriv_st_get_info_booking_history");

                $this->ariawpGetInfoBookingHistory();
            }

            public function ariawpGetInfoBookingHistory(){
                require_once( ST_TRAVELER_DIR."/inc/class.traveler.php");

                $order_id   = \STInput::request( 'order_id' );
                $service_id = \STInput::request( 'service_id' );
                $res        = [ 'status' => 0, 'msg' => "" ];

                $my_user      = wp_get_current_user();
                $user_partner = 0;
                $user_book    = 0;
                global $wpdb;
                $sql        = "SELECT * FROM {$wpdb->prefix}st_order_item_meta WHERE order_item_id = " . $order_id . " or wc_order_id = " . $order_id;
                $rs         = $wpdb->get_row( $sql, ARRAY_A );
                $order_data = $rs;
                // CalendarUtils::toJalali($start_Date['year'],$start_Date['month'],$start_Date['day']);
                /**
                 * Adding in persinan version 
                */
                $order_data['check_in'] = $this->toJalali( $order_data['check_in'] );
                $order_data['check_out'] = $this->toJalali( $order_data['check_out'] );
                $order_data['created'] = $this->toJalali( $order_data['created'] );

                if( !is_null( $order_data['starttime'] ) )
                    $order_data['starttime'] = $this->toJalali( $order_data['starttime'] );

                if ( !empty( $rs[ 'id' ] ) ) {
                    $user_book = $rs[ 'user_id' ];
                }
                if ( !empty( $rs[ 'partner_id' ] ) ) {
                    $user_partner = $rs[ 'partner_id' ];
                }
                $is_checked = true;
                if ( !is_user_logged_in() ) {
                    $is_checked = false;
                }
                if ( $user_book != $my_user->ID ) {
                    $is_checked = false;
                }
                if ( $user_partner == $my_user->ID ) {
                    $is_checked = true;
                }
                if ( current_user_can( 'manage_options' ) ) {
                    $is_checked = true;
                }
                if ( $is_checked and !empty( $rs ) ) {
                    $html      = '';
                    $post_type = $rs[ 'st_booking_post_type' ];
                    $order_id  = $rs[ 'wc_order_id' ];
                    if ( $order_data[ 'type' ] == "normal_booking" ) {
                        $html = $this->loadTemplate( 'user/detail-booking-history/' . $post_type, false, [ 'order_id' => $order_id, 'service_id' => $service_id, 'order_data' => $order_data ] );
                    } else {
                        $html = $this->loadTemplate( 'user/detail-booking-history/woo/' . $post_type, false, [ 'order_id' => $order_id, 'service_id' => $service_id, 'order_data' => $order_data ] );
                    }
                    $res[ 'status' ] = 1;
                    $res[ 'html' ]   = $html;
                } else {
                    $res[ 'msg' ] = '<p class="text-center">' . esc_html__( "Load failed...", ST_TEXTDOMAIN ) . '</p>';
                }
                echo json_encode( $res );
                die();
            }
            public function loadTemplate( $fileSlug  , $name = false , $data = array()){
                if (is_array($data))
                    extract($data);
                $fileUri = __DIR__.'/st/'.$fileSlug.'.php';
                $out = '';
                if( file_exists($fileUri ) ){
                    ob_start();
                    include( $fileUri );
                    $out = @ob_get_clean();
                    return $out;
                }
            }
            public function toJalali( string $input ){
                // "04/21/2017"
                $dateFormat = "MM/DD/YYYY";
                // echo date("YW", strtotime("2011-01-07"));
                $timestep = strtotime( $input );

                $day = date("d" , $timestep);
                $month = date( "m" , $timestep );
                $year = date( 'Y' , $timestep);

                $jalali = CalendarUtils::toJalali(  $year , $month , $day );
                $out = $jalali[0]."/".$jalali[1]."/".$jalali[2];
                return $out;
            }
        }

    }
?>