Our MWS API access keys have been granted in 2018/09/28, marketplace: Amazon.com.
We start using this until today, but when we using the “Amazon MWS Scratchpad”, it says “Access Denied, and return to error 401”.
We don’t know why, we contacted the MWS support, 20 days passed, still no reply.
Can anyone help please? It is very urgent!
Please check the screenshot accordingly. Thanks!