Wordpress Site Woocommerce - Order Emails Not Sending

I've a client website built in WordPress using WooCommerce. She always received the WooCommerce auto emails when someone made an order until 3 days ago. She gets the orders showing up on the WP Dashboard, PayPal send her a payment email but the WooCommerce auto emails have randomly stopped.

I need help getting these back again as they used to work for for the last year or two. She has a Gmail account.