WP MENU CART WOOCOMMERCE

Greetings – I am a new admin for this site as owner enabled recommended updates which caused several site issues. All resolved with the exception of WP Menu Cart. Customer can order a product which goes into cart, but can’t access cart to complete the order. I really need help to resolve as we cannot process any orders and I’m a WP Novice. I’ve checked everything and all looks well. HELP needed. Thank you. Cindy

WP ver 5.4
WP Cart V 2.7.8.1

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