ACF row to show thumbnails of recent posts - php

Question

I'm trying to create a ACF flexible content row to display the most recent post thumbnails for a given category. However it keeps throwing a critical error and I'm not sure why.
<?php
$section_id = get_sub_field('section_id')
$categories = get_sub_field('categories');
$tags = get_sub_field('tags');
$postnum = get_sub_field('number_of_posts');
if (!is_array($categories)) {
$categories = array($categories);
}
$tags = get_field('my_tags_field');
if (!is_array($tags)) {
$tags = array($tags);
}
$args = array(
'post_type' => 'post',
'numberposts' => $postnum,
'posts_per_page' => -1,
'tax_query' => array(
'relation' => 'OR',
array(
'taxonomy' => 'category',
'terms' => $categories
),
array(
'taxonomy' => 'post_tag',
'terms' => $tags
)
)
);
$query = new WP_Query($args);
?>
<style>
</style>
<section class="post_row_with_thumbnails" id="<?php echo $section_id; ?>">
<div class="container-fluid">
<div class="row">
<?php if( $query->have_posts() ) : while( $query->have_posts() ) : $query->the_post(); ?>
<div class="col">
<a href="<?php the_permalink(); ?>">
<img src="<?php echo wp_get_attachment_url( get_post_thumbnail_id( $post->ID ) ); ?>" class="project_pics">
<h5 class="posttitle"><?php the_title(); ?></h5>
<h6 class="postdate"><?php the_date(); ?></h6>
</a>
</div>
<?php endwhile; endif; wp_reset_postdata(); ?>
</div>
</div>
</section>
I have tried substituting WP_Query() with get_posts() but it gives me the same critical error.

Answer 1

In line 2 the ; at the end of the line, in this part:
$section_id = get_sub_field('section_id') ; THE DOT AND COMMA IS MISSING
This is the reason for the critical error.