Actually, I have confirmed the API Key & Secret as well as making sure the "Admin API access scopes" has "read_orders"... What else?

Thanks for the suggestion, but unfortunately I get the same response.What can I do to confirm that the API Key & Secret are correct? That is all I can think of to check.

URI: "https://storenamehere.myshopify.com/admin/orders.json?since_id=5764593647719&status=any&limit=250"Header: "Authorization", "Basic hashedkeyhere"Hashed Key is Generated using this: "Basic " + Base64Encode(this.apiKey + ":" + this.secretKey);Resp...