Fatal error: Uncaught Error: Call to undefined function is_checkout() in /home/customer/www/mkolimousine.com/public_html/wp-content/plugins/omnisend-connect/omnisend-woocommerce-hooks.php:201 Stack trace: #0 /home/customer/www/mkolimousine.com/public_html/wp-includes/class-wp-hook.php(308): omnisend_add_checkout_script('') #1 /home/customer/www/mkolimousine.com/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #2 /home/customer/www/mkolimousine.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /home/customer/www/mkolimousine.com/public_html/wp-includes/script-loader.php(2180): do_action('wp_enqueue_scri...') #4 /home/customer/www/mkolimousine.com/public_html/wp-includes/class-wp-hook.php(308): wp_enqueue_scripts('') #5 /home/customer/www/mkolimousine.com/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array) #6 /home/customer/www/mkolimousine.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #7 /home/customer/www/mkol in /home/customer/www/mkolimousine.com/public_html/wp-content/plugins/omnisend-connect/omnisend-woocommerce-hooks.php on line 201