Fatal error: Uncaught Error: Unsupported operand types: int * string
in /home/u204446/domains/meblotex.com.pl/public_html/wp-content/plugins/flexible-shipping-pro/src/WPDesk/FSPro/TableRate/Rule/Condition/Volume.php on line 98

Call stack:

1. WPDesk\F\T\R\C\Volume::get_product_volume()
   wp-content/plugins/flexible-shipping-pro/src/WPDesk/FSPro/TableRate/Rule/Condition/Volume.php:80
2. WPDesk\F\T\R\C\Volume::get_contents_volume()
   wp-content/plugins/flexible-shipping-pro/src/WPDesk/FSPro/TableRate/Rule/Condition/Volume.php:60
3. WPDesk\F\T\R\C\Volume::is_condition_matched()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/Rule/Condition/AbstractCondition.php:135
4. WPDesk\F\T\R\C\AbstractCondition::is_condition_matched_with_method_settings()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/Rule/Rule.php:131
5. WPDesk\F\T\R\Rule::is_rule_triggered()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/Rule/CostsCalculator.php:204
6. WPDesk\F\T\R\CostsCalculator::calculate_cost()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/Rule/CostsCalculator.php:130
7. WPDesk\F\T\R\CostsCalculator::process_rules()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/ShippingMethod/RateCalculator.php:258
8. WPDesk\F\T\S\RateCalculator::calculate_rate_for_rates()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/ShippingMethod/RateCalculator.php:227
9. WPDesk\F\T\S\RateCalculator::calculate_rate()
   wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/ShippingMethodSingle.php:272
10. WPDesk\F\T\ShippingMethodSingle::calculate_shipping()
    wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-shipping-method.php:233
11. WC_Shipping_Method::get_rates_for_package()
    wp-content/plugins/woocommerce/includes/class-wc-shipping.php:348
12. WC_Shipping::calculate_shipping_for_package()
    wp-content/plugins/woocommerce/includes/class-wc-shipping.php:260
13. WC_Shipping::calculate_shipping()
    wp-content/plugins/woocommerce/includes/class-wc-cart.php:1420
14. WC_Cart::calculate_shipping()
    wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php:339
15. WC_Cart_Totals::get_shipping_from_cart()
    wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php:850
16. WC_Cart_Totals::calculate_shipping_totals()
    wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php:144
17. WC_Cart_Totals::calculate()
    wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php:134
18. WC_Cart_Totals::__construct()
    wp-content/plugins/woocommerce/includes/class-wc-cart.php:1398
19. WC_Cart::calculate_totals()
    wp-includes/class-wp-hook.php:305
20. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:331
21. WP_Hook::do_action()
    wp-includes/plugin.php:476
22. do_action()
    wp-content/plugins/woocommerce/includes/class-wc-cart.php:1276
23. WC_Cart::add_to_cart()
    wp-content/plugins/woocommerce/includes/class-wc-form-handler.php:824
24. WC_Form_Handler::add_to_cart_handler_simple()
    wp-content/plugins/woocommerce/includes/class-wc-form-handler.php:796
25. WC_Form_Handler::add_to_cart_action()
    wp-includes/class-wp-hook.php:307
26. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:331
27. WP_Hook::do_action()
    wp-includes/plugin.php:476
28. do_action()
    wp-settings.php:620
29. require_once()
    wp-config.php:102
30. require_once()
    wp-load.php:50
31. require_once()
    wp-blog-header.php:13
32. require()
    index.php:17