I've gone through the Things to check list:

• SSL enabled (https://)
• WordPress 5.4
• WooCommerce 4.1
• Store is SSL enabled (https://)
• Legacy REST API is NOT enabled
• URL is correct (root of URL)

When I add the store to SE (selecting "WooCommerce") I enter the site URL (https://NxtGenDistro.com) and I am presented with a login page for my site. I log in as an Admin and click the Approve option.

I'm returned to SE to finish setting up the site settings. (no errors).

When I return to the list of sites, SE shows that the site is disconnected & offers a "Reconnect" button.

Inside my WooCommerce settings of my site, I do see a new ShippingEasy REST API entry that coincides with when I clicked the "Approve" button.

I've deactivated any plugin that was essential or updated & deleted the APIs and SE Stored and tried it all again multiple times. (I even tested out the Legacy WooCommerce Integration w/ Plugin to no avail).

What's next?