Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/nagorskakamila/public_html/knagbezp/wp-content/plugins/contact-form-7/modules/listo.php:7
Stack trace:
#0 {main}
thrown in /home/nagorskakamila/public_html/knagbezp/wp-content/plugins/contact-form-7/modules/listo.php on line 7