Snippets not working

Hi, none of my snippets is working in my installation. WordPress 5.5, Elementor, Neve Theme, Formidable Forms. I´m tring to eliminate an attached file in a thankyou message built in Formidable forms. Tried changing theme, deactivating plugins, deactivating mod security from serve. Any help? Formidable support tells me none of the php hooks is working on my installation.

This is the code

add_filter(‘frm_notification_attachment’, ‘remove_my_attachment’, 10, 3);
function remove_my_attachment($attachments, $form, $args) {
if ( $args[’email_key’] == 1493) { //change 1277 to the email ID that you would like to DROP the attachment for
$attachments = array(); //remove all attachments
}
return $attachments;
}