Excuse me for disturbing, the code for subject work well, but code for content return an empty body email.
add_filter ( 'wppb_register_user_email_message_without_admin_approval', 'wppbc_custom_email_confirmation_success_message', 20, 4 );
function wppbc_custom_email_confirmation_success_subject($user_message_content, $email, $password, $user_message_subject, $context ){
return 'new_message';
}
Hello
As I said in my post I already try it and it modify only email subject.
Email content remain the same
