No products in the cart.
I am using the stamps.com plugin with WooCommerce in WordPress. It is installed correctly, but when I go to calculate shipping I get the following error:
Stamps.com – Unable to Get Auth: Authentication failed.
I am pretty sure I have the correct UN and PW because I can use it actually to get into my stamps.com acct.
If the authentication information like UserID or Password is not correct, you get this Auth: Authentication failed error.
We request you to check the UserID and Password once again. For more information on troubleshooting, please refer the link: https://www.xadapter.com/2016/11/11/troubleshooting-woocommerce-stamps-com-plugin/