problems with Custom Product Urls

Do you mean “export”? Please, check php logs. Also open devtools console, tab Networking and chec the response. Or make a screenshot at least.

https;//www.fensterprofi24.de/screens/111.png

Can you help me ?

I tried, I asked you to check logs. Please, do it.

Unfortunately I don’t understand what to look for and where?

YES I can see the logs through Plesk, but what should I look for?

Check for errors, of course. Those which are related to the issue.

error in the admin-ajax.php. should I send the text or a link?

Post here the text of the error if the error is related to Uni CPO.

<?php
/**
* WordPress Ajax Process Execution
*
* @package WordPress
* @subpackage Administration
*
* @link https://codex.www.ads-software.com/AJAX_in_Plugins
*/

/**
* Executing Ajax process.
*
* @since 2.1.0
*/
define( ‘DOING_AJAX’, true );
if ( ! defined( ‘WP_ADMIN’ ) ) {
define( ‘WP_ADMIN’, true );
}

/** Load WordPress Bootstrap */
require_once dirname( __DIR__ ) . ‘/wp-load.php’;

/** Allow for cross-domain requests (from the front end). */
send_origin_headers();

header( ‘Content-Type: text/html; charset=’ . get_option( ‘blog_charset’ ) );
header( ‘X-Robots-Tag: noindex’ );

// Require an action parameter.
if ( empty( $_REQUEST[‘action’] ) ) {
wp_die( ‘0’, 400 );
}

/** Load WordPress Administration APIs */
require_once ABSPATH . ‘wp-admin/includes/admin.php’;

/** Load Ajax Handlers for WordPress Core */
require_once ABSPATH . ‘wp-admin/includes/ajax-actions.php’;

send_nosniff_header();
nocache_headers();

/** This action is documented in wp-admin/admin.php */
do_action( ‘admin_init’ );

$core_actions_get = array(
‘fetch-list’,
‘ajax-tag-search’,
‘wp-compression-test’,
‘imgedit-preview’,
‘oembed-cache’,
‘autocomplete-user’,
‘dashboard-widgets’,
‘logged-in’,
‘rest-nonce’,
);

$core_actions_post = array(
‘oembed-cache’,
‘image-editor’,
‘delete-comment’,
‘delete-tag’,
‘delete-link’,
‘delete-meta’,
‘delete-post’,
‘trash-post’,
‘untrash-post’,
‘delete-page’,
‘dim-comment’,
‘add-link-category’,
‘add-tag’,
‘get-tagcloud’,
‘get-comments’,
‘replyto-comment’,
‘edit-comment’,
‘add-menu-item’,
‘add-meta’,
‘add-user’,
‘closed-postboxes’,
‘hidden-columns’,
‘update-welcome-panel’,
‘menu-get-metabox’,
‘wp-link-ajax’,
‘menu-locations-save’,
‘menu-quick-search’,
‘meta-box-order’,
‘get-permalink’,
‘sample-permalink’,
‘inline-save’,
‘inline-save-tax’,
‘find_posts’,
‘widgets-order’,
‘save-widget’,
‘delete-inactive-widgets’,
‘set-post-thumbnail’,
‘date_format’,
‘time_format’,
‘wp-remove-post-lock’,
‘dismiss-wp-pointer’,
‘upload-attachment’,
‘get-attachment’,
‘query-attachments’,
‘save-attachment’,
‘save-attachment-compat’,
‘send-link-to-editor’,
‘send-attachment-to-editor’,
‘save-attachment-order’,
‘media-create-image-subsizes’,
‘heartbeat’,
‘get-revision-diffs’,
‘save-user-color-scheme’,
‘update-widget’,
‘query-themes’,
‘parse-embed’,
‘set-attachment-thumbnail’,
‘parse-media-shortcode’,
‘destroy-sessions’,
‘install-plugin’,
‘update-plugin’,
‘crop-image’,
‘generate-password’,
‘save-wporg-username’,
‘delete-plugin’,
‘search-plugins’,
‘search-install-plugins’,
‘activate-plugin’,
‘update-theme’,
‘delete-theme’,
‘install-theme’,
‘get-post-thumbnail-html’,
‘get-community-events’,
‘edit-theme-plugin-file’,
‘wp-privacy-export-personal-data’,
‘wp-privacy-erase-personal-data’,
‘health-check-site-status-result’,
‘health-check-dotorg-communication’,
‘health-check-is-in-debug-mode’,
‘health-check-background-updates’,
‘health-check-loopback-requests’,
‘health-check-get-sizes’,
‘toggle-auto-updates’,
);

// Deprecated.
$core_actions_post_deprecated = array(
‘wp-fullscreen-save-post’,
‘press-this-save-post’,
‘press-this-add-category’,
‘health-check-dotorg-communication’,
‘health-check-is-in-debug-mode’,
‘health-check-background-updates’,
‘health-check-loopback-requests’,
);
$core_actions_post = array_merge( $core_actions_post, $core_actions_post_deprecated );

// Register core Ajax calls.
if ( ! empty( $_GET[‘action’] ) && in_array( $_GET[‘action’], $core_actions_get, true ) ) {
add_action( ‘wp_ajax_’ . $_GET[‘action’], ‘wp_ajax_’ . str_replace( ‘-‘, ‘_’, $_GET[‘action’] ), 1 );
}

if ( ! empty( $_POST[‘action’] ) && in_array( $_POST[‘action’], $core_actions_post, true ) ) {
add_action( ‘wp_ajax_’ . $_POST[‘action’], ‘wp_ajax_’ . str_replace( ‘-‘, ‘_’, $_POST[‘action’] ), 1 );
}

add_action( ‘wp_ajax_nopriv_heartbeat’, ‘wp_ajax_nopriv_heartbeat’, 1 );

$action = ( isset( $_REQUEST[‘action’] ) ) ? $_REQUEST[‘action’] : ”;

if ( is_user_logged_in() ) {
// If no action is registered, return a Bad Request response.
if ( ! has_action( “wp_ajax_{$action}” ) ) {
wp_die( ‘0’, 400 );
}

/**
* Fires authenticated Ajax actions for logged-in users.
*
* The dynamic portion of the hook name, $action, refers
* to the name of the Ajax action callback being fired.
*
* @since 2.1.0
*/
do_action( “wp_ajax_{$action}” );
} else {
// If no action is registered, return a Bad Request response.
if ( ! has_action( “wp_ajax_nopriv_{$action}” ) ) {
wp_die( ‘0’, 400 );
}

/**
* Fires non-authenticated Ajax actions for logged-out users.
*
* The dynamic portion of the hook name, $action, refers
* to the name of the Ajax action callback being fired.
*
* @since 2.8.0
*/
do_action( “wp_ajax_nopriv_{$action}” );
}
// Default status.
wp_die( ‘0’ );

Sorry, but you have to hire a programmer if you do not know what to do.

many thanks for the help. just unfortunately I still don’t understand why the addson doesn’t work.