Dear Developers,I have the same issue with "invilad_error", I use postman to send my request(my code also have same response) here is the detailurl: https://appleid.apple.com/auth/tokenheader:{ "Content-Type": "application/x-www-form-urlencoded", "User-Agent": "myapp"}body:{ "client_id": "xxxxxxx", //the bundle id "client_secret": "xxxxxxxx", //generate by my code(I have changed the iat and exp in different values), and it is verified successfully in https://jwt.io/#debugger "grant_type": "authorization_code", "code": "xxxxxxxxx" //come from the app}I am wondering if there anything else need to set in develop account in the official web of apple, but no idea with it.