Array to string conversion

Calling the defaut page of the plugin (tools.php?page=wp-database-backup) I get the following PHP-notice:

Notice: Array to string conversion in /home/.../wp-content/plugins/wp-database-backup/includes/admin/admin_header_notification.php on line 19

Maybe just change in admin_header_notification.php (line 19ss):

if (strpos((string) $notifier_data, '<notifier>') === false) {
    $notifier_data = '<?xml version="1.0" encoding="UTF-8"?><notifier><latest>1.0</latest><changelog></changelog>';
}

to:

if ( !in_array('<notifier>', $notifier_data) ) {
    $notifier_data[] = '<?xml version="1.0" encoding="UTF-8"?><notifier><latest>1.0</latest><changelog></changelog>';
}

or $notifier_data = '<?xml ...'

WP Database Backup Version: 5.5.1
WP-Version: 5.4.1

• This topic was modified 4 years, 11 months ago by beka47.
• This topic was modified 4 years, 11 months ago by beka47.
• This topic was modified 4 years, 11 months ago by beka47.
• This topic was modified 4 years, 11 months ago by beka47.