PHP warning: count(): Parameter must be an array or an object that implements

[mindctrl]

Reported by customer here: https://secure.helpscout.net/conversation/640458173/15283/

get_header('shop')
wp-content/plugins/woocommerce/templates/single-product.php:23
locate_template()
wp-includes/general-template.php:41
load_template('wp-content/themes/latest/header.php')
wp-includes/template.php:647
do_action('latest_before_page')
wp-content/themes/latest/header.php:139
latest_page_title_wrap()
wp-includes/class-wp-hook.php:286
latest_page_titles()
wp-content/themes/latest/inc/template-tags.php:210
get_the_excerpt()
wp-content/themes/latest/inc/template-tags.php:179
apply_filters('get_the_excerpt')
wp-includes/post-template.php:397
wp_trim_excerpt()
wp-includes/class-wp-hook.php:288
get_the_content()
wp-includes/formatting.php:3308
wp-includes/post-template.php:284