When a merchant is doing a Woocommerce Checkout integration and they come across the following error on their checkout:
Error text: Error [CURL] - The requested URL returned error: 401
See below example of how it would look like on checkout:
This is due to the merchant putting in their access token incorrectly on their Woocommerce backend, see below example:
The text "Bearer" text should not be in this field/text box as it should only be the value starting with, from the example above, "OGF..."
When they remove "Bearer" they should not see the error on checkout again.
Here is another article on Checkout related issues, link