Pinhead Gunpowder

Uncaught Error: in_array(): Argument #2 ($haystack) must be of type array, null given
in /var/www/html/dev/wp-content/themes/royal-ny/templates/pages/tea/single.php on line 556

Call stack:

1. in_array('104370', NULL)
   wp-content/themes/royal-ny/templates/pages/tea/single.php:556
2. require('/var/www/html/dev/wp...pages/tea/single.php')
   wp-includes/template.php:812
3. load_template('/var/www/html/dev/wp...pages/tea/single.php', false, array)
   wp-includes/template.php:745
4. locate_template(array, true, false, array)
   wp-includes/general-template.php:206
5. get_template_part('templates/pages/tea/single')
   wp-content/themes/royal-ny/woocommerce/content-single-product.php:40
6. require('/var/www/html/dev/wp...t-single-product.php')
   wp-includes/template.php:812
7. load_template('/var/www/html/dev/wp...t-single-product.php', false)
   wp-content/plugins/woocommerce/includes/wc-core-functions.php:285
8. wc_get_template_part('content', 'single-product')
   wp-content/themes/royal-ny/woocommerce/single-product.php:39
9. include('/var/www/html/dev/wp...e/single-product.php')
   wp-includes/template-loader.php:106
10. require_once('/var/www/html/dev/wp-includes/template-loader.php')
    wp-blog-header.php:19
11. require('/var/www/html/dev/wp-blog-header.php')
    index.php:17