Warning: Use of undefined constant WC_VERSION - assumed 'WC_VERSION' (this will throw an Error in a future version of PHP) in /home/customer/www/smerkshirts.com/public_html/wp-content/plugins/woocommerce-cart-tab/includes/class-cart-tab-frontend.php on line 29

Fatal error: Uncaught Error: Call to undefined function is_cart() in /home/customer/www/smerkshirts.com/public_html/wp-content/plugins/woocommerce-cart-tab/includes/class-cart-tab-frontend.php:46 Stack trace: #0 /home/customer/www/smerkshirts.com/public_html/wp-includes/class-wp-hook.php(307): WooCommerce_Cart_Tab_Frontend->setup_styles('') #1 /home/customer/www/smerkshirts.com/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #2 /home/customer/www/smerkshirts.com/public_html/wp-includes/plugin.php(476): WP_Hook->do_action(Array) #3 /home/customer/www/smerkshirts.com/public_html/wp-includes/script-loader.php(2156): do_action('wp_enqueue_scri...') #4 /home/customer/www/smerkshirts.com/public_html/wp-includes/class-wp-hook.php(307): wp_enqueue_scripts('') #5 /home/customer/www/smerkshirts.com/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #6 /home/customer/www/smerkshirts.com/public_html/wp-includes/plugin.php(476): WP_Hook->do_action(Array) #7 /home/cus in /home/customer/www/smerkshirts.com/public_html/wp-content/plugins/woocommerce-cart-tab/includes/class-cart-tab-frontend.php on line 46