Hello Nancy, and thank you for posting to our community!
It appears you are attempting to use a non-secure form of your store URL. If you check the first section titled: "Things to Check BEFORE configuring your WooCommerce store in ShippingEasy." in the link below, we do recommend using SSL for your store URL.
Can you try using the secure URL version of your store when trying to reconnect? That should direct you to the login for your WooCommerce store so you can give ShippingEasy access.
Thank you and happy shipping!