Emails not delivered

Hi,
I’m having some problems with receiving emails.
The theme used is ‘ticketrama’, i am trying to get a notification every time a ticket is added via the ticket submission form provided by the theme.
Test Emails are received, back-end added tickets emails are received.
I used email log to check is the emails are being logged; they are not.
I tried adding the function function

bnfw_insert_post_hook_for_theme( $themes ) {
$themes[] = 'ticketrama';
return $themes;
}
add_filter( 'bnfw_insert_post_themes', 'bnfw_insert_post_hook_for_theme' );

to function.php but didn’t work.
I tried adding ‘ticketrama’ to the bnfw.php but also this didn’t work.
Any suggestions ?

Thank you

https://wordpress.org/plugins/bnfw/