Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Extensions/Core/StatusSolution.php:8 Stack trace: #0 /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Extensions/Core/StatusSolution.php(60): StatusSolution->__construct() #1 {main} thrown in /home/imperfettolab/public_html/web/app/plugins/post-smtp/Postman/Extensions/Core/StatusSolution.php on line 8