Media file imported but post and page content import not working

Hello,
When i import dummy data by using One Click Demo Import plugin. My all media file, widget data and redux theme option data imported properly but only pages and posts content import not working. pages and posts showing blank.

Where is the problem ? Any fault in my code ? Please give me a solution if it’s possible.
This is my one click demo import function code.

<?php

function my_theme_import_files() {
    return array(
        array(
            'import_file_name'             => esc_html__('Import Demo', 'my_theme'),
            'local_import_file'            => trailingslashit( get_template_directory() ) . 'libs/dummy-data/theme-demo-data.xml',
            'local_import_widget_file'     => trailingslashit( get_template_directory() ) . 'libs/dummy-data/widget-data.json',
            'local_import_redux'           => array(
                    array(
                        'file_path'   => trailingslashit( get_template_directory() ) . 'libs/dummy-data/redux-option.json',
                        'option_name' => 'my_theme_options',
                    ),
                ),
            'import_preview_image_url'     => trailingslashit( get_template_directory() ) . 'screenshot.png',
        ),
    );
}
add_filter( 'pt-ocdi/import_files', 'my_theme_import_files' );

function my_theme_after_import_setup() {
    // Assign menus to their locations.
    $main_menu = get_term_by( 'name', 'Primary', 'nav_menu' );

    set_theme_mod( 'nav_menu_locations', array(
            'primary' => $main_menu->term_id,
        )
    );

    // Assign front page and posts page (blog page).
    $front_page_id = get_page_by_title( 'Home-main' );
    $blog_page_id  = get_page_by_title( 'Blog' );

    update_option( 'show_on_front', 'page' );
    update_option( 'page_on_front', $front_page_id->ID );
    update_option( 'page_for_posts', $blog_page_id->ID );

}
add_action( 'pt-ocdi/after_import', 'my_theme_after_import_setup' );

function my_theme_demo_page_setup( $default_settings ) {
    $default_settings['parent_slug'] = 'themes.php';
    $default_settings['page_title']  = esc_html__( 'One Click Demo Import' , 'my_theme' );
    $default_settings['menu_title']  = esc_html__( 'Import Demo Data' , 'my_theme' );
    $default_settings['capability']  = 'import';
    $default_settings['menu_slug']   = 'ev-one-click-demo-import';

    return $default_settings;
}
add_filter( 'pt-ocdi/plugin_page_setup', 'my_theme_demo_page_setup' );
add_filter( 'pt-ocdi/disable_pt_branding', '__return_true' );