Pull Post Type on Gravity Forms Select

add_filter( 'gform_pre_render', 'populate_choices' );
add_filter( 'gform_pre_validation', 'populate_choices' );
add_filter( 'gform_pre_submission_filter', 'populate_choices' );
function populate_choices( $form ) {

    //only populating drop down for form id 3
    if ( $form['id'] != 3 ) {
       return $form;
    }

    global $post;
    $post_id = $post->ID;
    $event_start_date = get_post_meta( $post->ID, '_EventStartDate')[0];
    $event_venue_ID = get_post_meta( $post->ID, '_EventVenueID')[0];

    foreach ( $form['fields'] as &$field ) {

        // Adding Data to HTML Field to test it.

        if( $field->id == 13 && $field->type == 'select'  ){
            $choices = array();
            $same_night_events = array();
            $same_night_events[] = $post_id;
            $events_query = new WP_Query(array(
                'post_type'     => 'tribe_events',
                'posts_per_page'    => -1,
                'tax_query' => array(
                    array(
                        'taxonomy' => 'tribe_events_cat',
                        'field'    => 'slug',
                        'terms'    => 'series-classes',
                    ),
                ),
                'post__not_in' => array($post->ID),
                'meta_query' => array(
                    'relation' => 'AND',
                    array(
                        'key'     => '_EventStartDate',
                        'value'   => $event_start_date,
                        'compare' => '=',
                    ),
                    array(
                        'key'     => '_EventVenueID',
                        'value'   => $event_venue_ID,
                        'compare' => '=',
                    ),
                ),

            ));

            $all_events = array();
            if($events_query->have_posts()){
                while ($events_query->have_posts()) {
                    $events_query->the_post();

                    $same_night_events[] = get_the_id();

                    $all_events[get_the_id()] = get_the_title();
                    $choices[] = array(
                        'text' => get_the_title(),
                        'value' => get_the_title(),
                        'attributes' => array(
                                        'data-event-id' => get_the_id(),
                        ),
                    );

                }
            }
            wp_reset_query();

            update_post_meta($post_id, 'same_night_events', $same_night_events);

            $field->placeholder = 'Click to select';
            $field->choices = $choices;
        }
    }


    return $form;
}