$_posts =  Timber::get_posts(
		array(
			'posts_per_page' => 15,
			'post_status'    => 'publish',
			'paged'          => $paged,
			'post__not_in' => array(617240),
			'post_type'      => array( 'guide-post', 'post' ),
			'tax_query'      => array( // phpcs:ignore WordPress.DB.SlowDBQuery
				array(
					'taxonomy' => 'category',
					'field'    => 'slug',
					'terms'    => array( 'updates' ),
					'operator' => 'NOT IN',
				),
			),
		)
	);


foreach ( $_posts as $recent_post ) {  //<-- this is where the error starts in stack trace
	if ( in_array( $recent_post->ID, $posts_to_exclude_ids ) ) {
		continue;
	} else {
		$i ++;
	}

if ( ( count( $latest_pinned_post ) + count( $latest_posts ) ) < $article_count ) {
		// Add only those posts which are showing in latest column.
		// Exclude posts for recent posts.
		$exclude_global_front_posts[] = $recent_post->ID;
	}
	$latest_posts[] = $recent_post;
}

$context['posts']                      = $_posts;

Call stack:

    Timber\Post::setup()
    wp-content/themes/mytheme/vendor/timber/timber/src/PostsIterator.php:51
    Timber\PostsIterator::current()
    wp-content/themes/mytheme/front-page.php:89
    include()
    wp-includes/template-loader.php:106
    require_once()
    wp-blog-header.php:19
    require()
    index.php:17