Hello, I need help with starting use Amazon advertising API.
I have tried to set up access to the API following this tutorial
But on step 2 on request
https://www.amazon.com/ap/oa?client_id=MY_CLIENT_ID ≻ope=cpc_advertising:campaign_management&response_type=code &redirect_uri=MY_RETURN_URL
(Client_id and return url I received in the previous steps)
I got 500 error from server with message:
An error occurred when we tried to process your request. Rest assured, we're already working on the problem and expect to resolve it shortly.
What am I doing wrong?