The events calendar 4.9.0.2 and 4.9.0.3 update PHP Errors

Hello, I’m trying to update my site, actually using 4.9.0, but every time I try I get this errors:

PHP Fatal error:  Uncaught Error: Call to undefined function tribe_get_events() in /var/www/..../wp-content/themes/DeepFocus-child/home.php:35
Stack trace:
#0 /var/www/..../wp-includes/template-loader.php(77): include()
#1 /var/www/..../wp-blog-header.php(19): require_once('/var/www/...')
#2 /var/www/salotto/index.php(17): require('/var/www/...')
#3 {main}
  thrown in /var/www/..../wp-content/themes/DeepFocus-child/home.php on line 35
  
  
PHP Fatal error:  Uncaught Error: Call to undefined function tribe_is_event_query() in /var/www/salotto/wp-content/themes/DeepFocus-child/includes/breadcrumbs.php:20
Stack trace:
#0 /var/www/..../wp-includes/template.php(706): require()
#1 /var/www/..../wp-includes/template.php(653): load_template('/var/www/...', false)
#2 /var/www/..../wp-includes/general-template.php(157): locate_template(Array, true, false)
#3 /var/www/..../wp-content/themes/DeepFocus-child/post-full-nometa.php(17): get_template_part('includes/breadc...')
#4 /var/www/..../wp-includes/template-loader.php(77): include('/var/www/...')
#5 /var/www/..../wp-blog-header.php(19): require_once('/var/www/...')
#6 /var/www/..../index.php(17): require('/var/www/...')
#7 {main}
  thrown in /var/www/..../wp-content/themes/DeepFocus-child/includes/breadcrumbs.php on line 20

this happens opening the home page that has a ‘next events’ section.

this is the home.php up to the error line

<?php get_header();
 ?>

        <div id="content-full">
                <div id="home-top"></div>
                <div id="hr">
                        <div id="hr-center">
                                <div id="intro">
                                        <div class="center-highlight">

                                                <div class="container">

                                                        <?php if (get_option('deepfocus_featured') == 'on') get_template_part('includes/featured'); ?>

                                                        <?php if (get_option('deepfocus_quote') == 'on') { ?>
                                                                <div id="tagline">
                                                                        <p><?php echo wp_kses_post(get_option('deepfocus_quote_one')); ?><span class="quote2" style="padding-left:0px;"></span></p>
                                                                        <!-- <span class="quote2"><?php echo wp_kses_post(get_option('deepfocus_quote_two')); ?></span> -->
                                                                </div>  <!-- end #tagline-->
                                                        <?php } ?>

                                                </div> <!-- end .container -->
                                        </div> <!-- end .center-highlight -->
                                </div>  <!-- end #intro -->
                        </div> <!-- end #hr-center -->
                </div> <!-- end #hr -->

                <div class="center-highlight">
                        <div class="container">

                                <?php
                                        $featured_events = tribe_get_events( array(
                                            'tribe_events_cat'  => '',
                                            'start_date'        => current_time( 'd-m-Y' ),
                                            'showposts'         => 3
                                        ));

and this is the breadcrumb.php

<div id="breadcrumbs">

        <?php
                  if(function_exists('bcn_display')) { bcn_display(); }
                  else { ?>
                                <a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php esc_html_e('Home','DeepFocus') ?></a> <span class="raquo">&raquo;</span>

                                <?php if( is_tag() ) { ?>
                                        <?php esc_html_e('Posts Tagged ','DeepFocus') ?><span class="raquo">&quot;</span><?php single_tag_title(); echo('&quot;'); ?>
                                <?php } elseif (is_day()) { ?>
                                        <?php esc_html_e('Posts made in','DeepFocus') ?> <?php the_time('F jS, Y'); ?>
                                <?php } elseif (is_month()) { ?>
                                        <?php esc_html_e('Posts made in','DeepFocus') ?> <?php the_time('F, Y'); ?>
                                <?php } elseif (is_year()) { ?>
                                        <?php esc_html_e('Posts made in','DeepFocus') ?> <?php the_time('Y'); ?>
                                <?php } elseif (is_search()) { ?>
                                        <?php esc_html_e('Search results for','DeepFocus') ?> <?php the_search_query() ?>
                                <?php } elseif (tribe_is_event_query() && is_single()) { ?> <?php echo '<a href="'.tribe_get_events_link().'">Eventi</a>'; ?>
                                <?php } elseif (is_single()) { ?>
                                        <?php $category = get_the_category();
                                                  $catlink = get_category_link( $category[0]->cat_ID );
                                                  echo ('<a href="'.esc_url($catlink).'">'.esc_html($category[0]->cat_name).'</a> '.'<span class="raquo">&raquo;</span> '.get_the_title()); ?>
                                <?php } elseif (is_category()) { ?>
                                        <?php single_cat_title(); ?>
                                <?php } elseif (is_author()) { ?>
                                        <?php $curauth = get_userdata($post->post_author); ?>
                                        <?php esc_html_e('Posts by ','DeepFocus'); echo ' ',$curauth->nickname; ?>
                                <?php } elseif (is_page()) { ?>
                                        <?php single_post_title(); ?>
                                <?php }; ?>
        <?php }; ?>
</div> <!-- end #breadcrumbs -->

The two functions used

$featured_events = tribe_get_events( array(
                                            'tribe_events_cat'  => '',
                                            'start_date'        => current_time( 'd-m-Y' ),
                                            'showposts'         => 3
                                        ));

<?php } elseif (tribe_is_event_query() && is_single()) { ?> <?php echo '<a href="'.tribe_get_events_link().'">Eventi</a>'; ?>

are not found anymore.
Any ideas ?