Payment Critical Error

Hello, i’ve started facing an issue with payments when customers messaged me there is critical error when they try to place an order.
I’ve gone through other threads with similar issue and can’t find solution. I haven’t changed anything on my website and problem started occuring. I have turn on test mode for stripe payment gateway and after failed payment i cant even access the cart anymore as it shows me “critical error” straight away.

I’m including code from “fatal errors” log when trying to open my cart and log from placing order: “

2025-11-19T19:17:49+00:00 Debug [Shortcode #1] Place Order flow initiated  
Additional context
{
    "order_uid": "a6bd5320-992d-4d1e-8e83-c65cd9bae403",
    "store_url": "https://oliacandles.co.uk",
    "last_error": {
        "type": 8192,
        "message": "WooCommerce\PayPalCommerce\Googlepay\Assets\Button::__construct(): Implicitly marking parameter $new_settings as nullable is deprecated, the explicit nullable type must be used instead",
        "file": "/home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce-paypal-payments/modules/ppcp-googlepay/src/Assets/Button.php",
        "line": 101
    },
    "backtrace": [
        {
            "file": "/home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php",
            "line": 1301,
            "function": "wc_log_order_step"
        },
        {
            "file": "/home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php",
            "line": 543,
            "function": "process_checkout",
            "class": "WC_Checkout",
            "type": "->"
        },
        {
            "file": "/home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-includes/class-wp-hook.php",
            "line": 324,
            "function": "checkout",
            "class": "WC_AJAX",
            "type": "::"
        }
    ],
    "remote-logging": false
}

2025-11-19T15:27:49+00:00 Critical Uncaught TypeError: explode(): Argument #2 ($string) must be of type string, array given in /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/wc-cart-functions.php:524  
Additional context
{
    "error": {
        "type": 1,
        "file": "/home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/wc-cart-functions.php",
        "line": 524
    },
    "remote-logging": true,
    "backtrace": [
        "",
        "#0 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/wc-cart-functions.php(524): explode(':', Array)",
        "#1 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/wc-cart-functions.php(471): wc_get_default_shipping_method_for_package(0, Array, Array)",
        "#2 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/src/Utilities/ShippingUtil.php(24): wc_get_chosen_shipping_method_for_package(0, Array)",
        "#3 [internal function]: Automattic\WooCommerce\Utilities\ShippingUtil::{closure:Automattic\WooCommerce\Utilities\ShippingUtil::get_selected_shipping_rates_from_packages():23}(0, Array)",
        "#4 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/src/Utilities/ShippingUtil.php(22): array_map(Object(Closure), Array, Array)",
        "#5 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1543): Automattic\WooCommerce\Utilities\ShippingUtil::get_selected_shipping_rates_from_packages(Array)",
        "#6 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1517): WC_Cart->get_chosen_shipping_methods(Array)",
        "#7 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(352): WC_Cart->calculate_shipping()",
        "#8 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(856): WC_Cart_Totals->get_shipping_from_cart()",
        "#9 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(148): WC_Cart_Totals->calculate_shipping_totals()",
        "#10 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(138): WC_Cart_Totals->calculate()",
        "#11 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1465): WC_Cart_Totals->__construct(Object(WC_Cart))",
        "#12 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/essential-addons-for-elementor-lite/includes/Template/Woocommerce/Checkout/Woo_Checkout_Helper.php(390): WC_Cart->calculate_totals()",
        "#13 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-content/plugins/essential-addons-for-elementor-lite/includes/Traits/Ajax_Handler.php(571): Essential_Addons_Elementor\Classes\AllTraits::checkout_order_review_default(Array)",
        "#14 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-includes/class-wp-hook.php(324): Essential_Addons_Elementor\Classes\Bootstrap->woo_checkout_update_order_review('')",
        "#15 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)",
        "#16 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)",
        "#17 /home/ukggnlingg/domains/oliacandles.co.uk/public_html/wp-admin/admin-ajax.php(207): do_action('wp_ajax_nopriv_...')",
        "#18 {main}",
        "thrown"
    ]
}