critical issue on confirmation

I cannot add a image from the error here as it is not a URL. Seems the block stopped working.
Is it possible to send the confirmation by mail?
Really a urgent issue!

Found this error in the logs:
[Mon Dec 08 10:29:08.630142 2025] [proxy_fcgi:error] [pid 1213281:tid 140489167820544] [client 172.68.51.8:64780] AH01071: Got error ‘PHP message: PHP Warning: Trying to access array offset on false in /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-content/plugins/addonsuite-for-wpadverts/includes/plugin-functions.php on line 29; PHP message: PHP Warning: Trying to access array offset on false in /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-content/plugins/addonsuite-for-wpadverts/includes/plugin-functions.php on line 48; PHP message: PHP Fatal error: Uncaught TypeError: wp_is_valid_utf8(): Argument #1 ($bytes) must be of type string, null given, called in /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-includes/formatting.php on line 2038 and defined in /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-includes/utf8.php:39\nStack trace:\n#0 /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-includes/formatting.php(2038): wp_is_valid_utf8(NULL)\n#1 /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-content/plugins/wpadverts/addons/contact-form/includes/class-block-details.php(294): sanitize_file_name(NULL)\n#2 /var/www/vhosts/sprit583.web10.wh20.easyname.systems/www2.umfc-kirchschlag.at/wp-content/plugins/wpadverts/addons/contact-form/includes/class-block-details.php(161): Adext_Contact_Form_Block_Details->_adext_contact_form_content(2864, Array)\n#3 /var/www/vhosts/sprit583.web10.wh20.easyname.systems/ww…’, referer: https://www2.umfc-kirchschlag.at/advert/test-intern/

hi greg, update is working!

thank you! If possible (and as a backup) a email template for confirmation emails would be great!