RSVP entries not recorded

Users are getting the confirmation on page but no mail is sent to them nor record created, number of available tickets too is unchanged

A small clarification-

Following a previous topic I did try some code in function.php aiming at limiting to one the number of rsvp

//Disable number counter for rsvp
add_action( 'wp_footer', 'tribe_limit_rsvps_to_one' );

function tribe_limit_rsvps_to_one() {
	wp_enqueue_script( 'jquery' );
?>
	<script>
		jQuery(document).ready(function($){
			if ( $('.tribe-events-tickets' ).length ) {
				var $input = $('.tribe-events-tickets' ).find( 'input.tribe-ticket-quantity' );
				$input.attr( 'type', 'text' );
				//$input.attr( 'disabled', 'disabled' );
				$input.attr( 'max', '1' );
				$input.val( '1' );
			}
		});
	</script>
<?php 
}

it worked but prevented the auto fill of user’s data, stopping the whole process.
Another topic suggested a fix with a override on the file rsvp.php, following is the code for that page:

<?php
/**
 * This template renders the RSVP ticket form
 *
 * @version 4.2.7
 *
 * @var bool $must_login
 */
$is_there_any_product         = false;
$is_there_any_product_to_sell = false;
ob_start();
$messages = Tribe__Tickets__RSVP::get_instance()->get_messages();
$messages_class = $messages ? 'tribe-rsvp-message-display' : '';
$now = current_time( 'timestamp' );
?>
<form action="" class="cart <?php echo esc_attr( $messages_class ); ?>" method="post" enctype='multipart/form-data'>
	<h2 class="tribe-events-tickets-title"><?php esc_html_e( 'RSVP', 'event-tickets' ) ?></h2>
	<div class="tribe-rsvp-messages">
		<?php
		if ( $messages ) {
			foreach ( $messages as $message ) {
				?>
				<div class="tribe-rsvp-message tribe-rsvp-message-<?php echo esc_attr( $message->type ); ?>">
					<?php echo esc_html( $message->message ); ?>
				</div>
				<?php
			}//end foreach
		}//end if
		?>
		<div class="tribe-rsvp-message tribe-rsvp-message-error tribe-rsvp-message-confirmation-error" style="display:none;">
			<?php esc_html_e( 'Please fill in the RSVP confirmation name and email fields.', 'event-tickets' ); ?>
		</div>
	</div>
	<table width="100%" class="tribe-events-tickets tribe-events-tickets-rsvp">
		<?php
		foreach ( $tickets as $ticket ) {
			// if the ticket isn't an RSVP ticket, then let's skip it
			if ( 'Tribe__Tickets__RSVP' !== $ticket->provider_class ) {
				continue;
			}
			if ( $ticket->date_in_range( $now ) ) {
				$is_there_any_product = true;
				?>
				<tr>
					<td class="tribe-ticket quantity" data-product-id="<?php echo esc_attr( $ticket->ID ); ?>">
						<input type="hidden" name="product_id[]" value="<?php echo absint( $ticket->ID ); ?>">
						<?php
						if ( $ticket->is_in_stock() ) {
							$is_there_any_product_to_sell = true;
							?>
							<input type="number" class="tribe-ticket-quantity" min="0" max="<?php echo esc_attr( $ticket->remaining() ); ?>" name="quantity_<?php echo absint( $ticket->ID ); ?>" value="0" <?php disabled( $must_login ); ?> >
							<?php
							if ( $ticket->managing_stock() ) {
								?>
								<span class="tribe-tickets-remaining">
									<?php
									echo sprintf( esc_html__( '%1$s out of %2$s available', 'event-tickets' ), $ticket->remaining(), $ticket->original_stock() );
									?>
								</span>
								<?php
							}
						}//end if
						else {
							?>
							<span class="tickets_nostock"><?php esc_html_e( 'Out of stock!', 'event-tickets' ); ?></span>
							<?php
						}
						?>
					</td>
					<td class="tickets_name">
						<?php echo esc_html( $ticket->name ); ?>
					</td>
					<td class="tickets_description" colspan="2">
						<?php echo esc_html( $ticket->description ); ?>
					</td>
				</tr>
				<?php
				/**
				 * Allows injection of HTML after an RSVP ticket table row
				 *
				 * @var Event ID
				 * @var Tribe__Tickets__Ticket_Object
				 */
				do_action( 'event_tickets_rsvp_after_ticket_row', tribe_events_get_ticket_event( $ticket->id ), $ticket );
			}
		}//end foreach
		if ( $is_there_any_product_to_sell ) {
			?>
			<tr class="tribe-tickets-meta-row">
				<td colspan="4" class="tribe-tickets-attendees">
					<header><?php esc_html_e( 'Send RSVP confirmation to:', 'event-tickets' ); ?></header>
					<?php
					/**
					 * Allows injection of HTML before RSVP ticket confirmation fields
					 *
					 * @var array of Tribe__Tickets__Ticket_Object
					 */
					do_action( 'event_tickets_rsvp_before_confirmation_fields', $tickets );
					$name  = '';
					$email = '';
					$current_user = wp_get_current_user();
					if ( $current_user->ID ) {
					    
					    $name  = $current_user->user_firstname . ' ' . $current_user->user_lastname;
					    $email = $current_user->user_email;
					}
					?>

					<table class="tribe-tickets-table">
						<tr class="tribe-tickets-full-name-row">
							<td>
								<label for="tribe-tickets-full-name"><?php esc_html_e( 'Full Name', 'event-tickets' ); ?>:</label>
							</td>
							<td colspan="3">
								<input type="text" name="attendee[full_name]" id="tribe-tickets-full-name" value="<?php echo $name; ?>">
							</td>
						</tr>
						<tr class="tribe-tickets-email-row">
							<td>
								<label for="tribe-tickets-email"><?php esc_html_e( 'Email', 'event-tickets' ); ?>:</label>
							</td>
							<td colspan="3">
								<input type="email" name="attendee[email]" id="tribe-tickets-email" value="<?php echo $email; ?>">
							</td>
						</tr>

						<tr class="tribe-tickets-order_status-row">
							<td>
								<label for="tribe-tickets-order_status"><?php esc_html_e( 'RSVP', 'event-tickets' ); ?>:</label>
							</td>
							<td colspan="3">
								<?php Tribe__Tickets__Tickets_View::instance()->render_rsvp_selector( 'attendee[order_status]', '' ); ?>
							</td>
						</tr>

						<?php if ( class_exists( 'Tribe__Tickets_Plus__Attendees_List' ) && ! Tribe__Tickets_Plus__Attendees_List::is_hidden_on( get_the_ID() ) ) : ?>
							<tr class="tribe-tickets-attendees-list-optout">
								<td colspan="4">
									<input type="checkbox" name="attendee[optout]" id="tribe-tickets-attendees-list-optout">
									<label for="tribe-tickets-attendees-list-optout"><?php esc_html_e( 'Don\'t list me on the public attendee list', 'event-tickets' ); ?></label>
								</td>
							</tr>
						<?php endif; ?>
					</table>
				</td>
			</tr>
			<tr>
				<td colspan="4" class="add-to-cart">
					<?php if ( $must_login ): ?>
						<?php $login_url = Tribe__Tickets__Tickets::get_login_url() ?>
						<a href="<?php echo $login_url; ?>"><?php esc_html_e( 'Login to RSVP', 'event-tickets' );?></a>
					<?php else: ?>
						<button type="submit" name="tickets_process" value="1" class="button alt"><?php esc_html_e( 'Confirm RSVP', 'event-tickets' );?></button>
					<?php endif; ?>
				</td>
			</tr>
			<?php
		}
		?>
	</table>
</form>

<?php
$content = ob_get_clean();
if ( $is_there_any_product ) {
	echo $content;
	// If we have rendered tickets there is generally no need to display a 'tickets unavailable' message
	// for this post
	$this->do_not_show_tickets_unavailable_message();
} else {
	// Indicate that we did not render any tickets, so a 'tickets unavailable' message may be
	// appropriate (depending on whether other ticket providers are active and have a similar
	// result)
	$this->maybe_show_tickets_unavailable_message( $tickets );
}

It turns out that the above code is fixing the auto fill problem (the error was: Please fill in the RSVP confirmation name and email fields) but creates some new issue preventing the RSVP entry from working correctly

I do not have a live example Url of the issue because I have removed both the code from function.php and the override to rsvp.php.

Thank you
Andrea