Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/includes/Product.class.php:520 Stack trace: #0 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/includes/Product.class.php(520): array_merge(Array, NULL) #1 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/ewd-upcp-templates/single-product-additional-images.php(3): ewdupcpProduct->get_all_images() #2 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/views/View.SingleProduct.class.php(137): include('/home/royalrent...') #3 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/ewd-upcp-templates/default-single-product.php(19): ewdupcpViewSingleProduct->print_additional_images() #4 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/views/View.SingleProduct.class.php(56): include('/home/royalrent...') #5 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/views/View.Catalog.class.php(151): ewdupcpViewSingleProduct->render() #6 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/ewd-upcp-templates/catalog-single-product.php(5): ewdupcpViewCatalog->print_single_product() #7 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/views/View.Catalog.class.php(135): include('/home/royalrent...') #8 /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/includes/template-functions.php(45): ewdupcpViewCatalog->render() #9 /home/royalrentals/public_html/wp-includes/shortcodes.php(393): ewd_upcp_catalog_shortcode(Array, '', 'product-catalog...') #10 [internal function]: do_shortcode_tag(Array) #11 /home/royalrentals/public_html/wp-includes/shortcodes.php(265): preg_replace_callback('/\\[(\\[?)(produc...', 'do_shortcode_ta...', '[product-catalo...') #12 /home/royalrentals/public_html/wp-includes/class-wp-hook.php(308): do_shortcode('[product-catalo...') #13 /home/royalrentals/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('[product-catalo...', Array) #14 /home/royalrentals/public_html/wp-includes/post-template.php(255): apply_filters('the_content', '[product-catalo...') #15 /home/royalrentals/public_html/wp-content/themes/laurel-child/page.php(54): the_content() #16 /home/royalrentals/public_html/wp-includes/template-loader.php(113): include('/home/royalrent...') #17 /home/royalrentals/public_html/wp-blog-header.php(19): require_once('/home/royalrent...') #18 /home/royalrentals/public_html/index.php(17): require('/home/royalrent...') #19 {main} thrown in /home/royalrentals/public_html/wp-content/plugins/ultimate-product-catalogue/includes/Product.class.php on line 520