deprecation warnings helper_plugin_data

Hello :)

After the latest update of the plugin (2023-06-19) I get the following deprecation warnings in Jack Jackrum: Are they related to this plugin (not 100% sure)?

2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:372 dokuwiki\Utf8\PhpString::strtolower() should be used instead! 2023-06-20 06:52:15utf8_strtolower() is deprecated. It was called from helper_plugin_data::_column() in /var/www/html/usrnm-dokuwiki/lib/plugins/data/helper.php:375 dokuwiki\Utf8\PhpString::strtolower() should be used instead!

Please also let me know if that's something on my end or not.

Thank you very much in advance :) Best, -a-