Woo shopping cart empty for guest users

As long as someone is logged into an account, items are added to the cart. However, unregistered users click on add to cart, and the cart appears as empty when going to that page. I have disabled all plugins other than woocommerce and switched to TwentyTwenty theme. The issue still persists. I have also cleared all caches (including server side). And, yes, I have seen this article https://www.businessbloomer.com/woocommerce-solving-cart-empty-issue/
I am at a loss and my client needs their site working ASAP.

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