Category Image Slider

Fatal error: Uncaught Error: Call to undefined function porto_generate_placeholder() in /home/customer/www/premiumbookprints.com/public_html/wp-content/plugins/porto-functionality/shortcodes/templates/porto_carousel_item.php:41 Stack trace: #0 /home/customer/www/premiumbookprints.com/public_html/wp-content/plugins/porto-functionality/shortcodes/porto-shortcodes.php(310): include() #1 /home/customer/www/premiumbookprints.com/public_html/wp-includes/shortcodes.php(433): PortoShortcodesClass->{closure}(Array, '', 'porto_carousel_...') #2 [internal function]: do_shortcode_tag(Array) #3 /home/customer/www/premiumbookprints.com/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(porto_...', 'do_shortcode_ta...', '[porto_carousel...') #4 /home/customer/www/premiumbookprints.com/public_html/wp-content/plugins/porto-functionality/shortcodes/templates/porto_carousel.php(179): do_shortcode('[porto_carousel...') #5 /home/customer/www/premiumbookprints.com/public_html/wp-content/plugins/porto-functionality/s in /home/customer/www/premiumbookprints.com/public_html/wp-content/plugins/porto-functionality/shortcodes/templates/porto_carousel_item.php on line 41