Fatal error: Uncaught Error: Call to undefined function is_product() in /home/hoppers9/public_html/hopperstock.com/wp-content/themes/listify-child/functions.php:591 Stack trace: #0 /home/hoppers9/public_html/hopperstock.com/wp-includes/class-wp-hook.php(287): prevent_access_to_product_page(Object(WP)) #1 /home/hoppers9/public_html/hopperstock.com/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array) #2 /home/hoppers9/public_html/hopperstock.com/wp-includes/plugin.php(544): WP_Hook->do_action(Array) #3 /home/hoppers9/public_html/hopperstock.com/wp-includes/class-wp.php(752): do_action_ref_array('wp', Array) #4 /home/hoppers9/public_html/hopperstock.com/wp-includes/functions.php(1274): WP->main('') #5 /home/hoppers9/public_html/hopperstock.com/wp-blog-header.php(16): wp() #6 /home/hoppers9/public_html/hopperstock.com/index.php(17): require('/home/hoppers9/...') #7 {main} thrown in /home/hoppers9/public_html/hopperstock.com/wp-content/themes/listify-child/functions.php on line 591