Motorówką po Odrze

Fatal error: Uncaught Error: Call to undefined function is_product() in /wp-content/themes/wpparallax/inc/template-functions.php:310 Stack trace: #0 /wp-includes/class-wp-hook.php(292): wp_parallax_header_banner_x('') #1 /wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters('', Array) #2 /wp-includes/plugin.php(484): WP_Hook->do_action(Array) #3 /wp-content/themes/wpparallax/page.php(23): do_action('wp_parallax_bre...') #4 /wp-includes/template-loader.php(106): include('/wp-content/the...') #5 /wp-blog-header.php(19): require_once('/wp-includes/te...') #6 /index.php(17): require('/wp-blog-header...') #7 {main} thrown in /wp-content/themes/wpparallax/inc/template-functions.php on line 310