I am getting this issue as well. I successfully created the client_secret with the help of this code [https://gist.github.com/ameen-sarsour/e14a1d5bae5b61080dfdd5b1430c3e10) and the after passing all the relevant information from APPLE. It successfully returned me the { "access_token":"...", "token_type":"Bearer", "expires_in":3600, "refresh_token":"....", "id_token": "..." } by the help of above I updated my backend REST APIs for apple sign in and submitted the APIs and sign in feature for QA. Today, I am surprised to know that the same code is now throwing this error {"error":"invalid_grant"} I am not able to digest WHY is this happening? Can anyone suggest any solution or what happened ? Did apple change its policies in 1 night?

This library is throwing a lot of errors. https://github.com/patrickbussmann/oauth2-apple For the start, the code redirect the page to apple website and it show the following screen. "invalid_client" Please suggest what to do.