WooCommerce Fatal Error

Hi,

I received the following on an email from wordpress.
Can you please help me and let me know what action I need to take/what this refers to?

Fatal error: Uncaught Error: Call to a member function get() on null in /home/allhighs/public_html/wp-content/plugins/woocommerce/includes/data-stores/class-wc-customer-data-store-session.php:96 Stack trace: #0 /home/allhighs/public_html/wp-content/plugins/woocommerce/includes/class-wc-data-store.php(159): WC_Customer_Data_Store_Session->read(Object(WC_Customer)) #1 /home/allhighs/public_html/wp-content/plugins/woocommerce/includes/class-wc-customer.php(116): WC_Data_Store->read(Object(WC_Customer)) #2 /home/allhighs/public_html/wp-content/plugins/mc4wp-premium/ecommerce3/includes/class-cart-observer.php(250): WC_Customer->__construct(68, true) #3 /home/allhighs/public_html/wp-includes/class-wp-hook.php(287): MC4WP_Ecommerce_Cart_Observer->on_cart_updated(”, Object(WP_User)) #4 /home/allhighs/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #5 /home/allhighs/public_html/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #6 /home/allhighs/public_html/wp-content/plugins/temporary-logi in /home/allhighs/public_html/wp-content/plugins/woocommerce/includes/data-stores/class-wc-customer-data-store-session.php on line 96
There has been a critical error on this website. Please check your site admin email inbox for instructions.

The page I need help with: [log in to see the link]