Fatal error: Uncaught Error: Call to undefined function is_checkout() in /www/htdocs/w01cbd9a/krokostil.at/wp-content/plugins/woo-payment-discounts/includes/class-woo-payment-add-discounts.php:21 Stack trace: #0 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/class-wp-hook.php(310): Woo_Payment_Add_Discounts->enqueue_scripts('') #1 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array) #2 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/script-loader.php(2225): do_action('wp_enqueue_scri...') #4 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/class-wp-hook.php(310): wp_enqueue_scripts('') #5 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array) #6 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #7 /www/htdocs/w01cbd9a/krokostil.at/wp-includes/general-template.php(3053): do_action('wp_head') #8 /ww in /www/htdocs/w01cbd9a/krokostil.at/wp-content/plugins/woo-payment-discounts/includes/class-woo-payment-add-discounts.php on line 21