Fatal error: Uncaught Error: Call to undefined function is_product() in /home3/manuals/public_html/wp-content/themes/generatepress_child/functions.php:429
Stack trace:
#0 /home3/manuals/public_html/wp-includes/class-wp-hook.php(324): quantity_wp_head('')
#1 /home3/manuals/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#2 /home3/manuals/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#3 /home3/manuals/public_html/wp-includes/general-template.php(3192): do_action('wp_head')
#4 /home3/manuals/public_html/wp-content/themes/generatepress/header.php(16): wp_head()
#5 /home3/manuals/public_html/wp-includes/template.php(810): require_once('/home3/manuals/...')
#6 /home3/manuals/public_html/wp-includes/template.php(745): load_template('/home3/manuals/...', true, Array)
#7 /home3/manuals/public_html/wp-includes/general-template.php(48): locate_template(Array, true, true, Array)
#8 /home3/manuals/public_html/wp-content/themes/generatepress/page.php(17): get_header()
#9 /home3/m in /home3/manuals/public_html/wp-content/themes/generatepress_child/functions.php on line 429