Hi stefanato1
It seems to be issue in J4, I just updated this file: /templates/gk_bauhaus/html/com_content/article/default.php
Line 154:
($params->get('show_email_icon') && !JFactory::getApplication()->input->get('print','','int')) || ($params->get('show_print_icon') && !JFactory::getApplication()->input->get('print','','int'))
It's working now, kindly check.