Request to the [https://appleid.apple.com/auth/token] endpoint failed. Status code [400].

Error response is
{
"error" : "invalid_client"
}

Does anyone know what could be an issue here?

Here are more details:
FusionAuth ver.1.22.2

Apple IdP Response Debug Log
1/21/2021 12:15:58 PM GMT Validate the provided [id_token] value [--JWT-SKIPED--]
1/21/2021 12:15:58 PM GMT Decode the [id_token].
1/21/2021 12:15:58 PM GMT Assert the [iss] claim is equal to [https://appleid.apple.com].
1/21/2021 12:15:58 PM GMT Assert the [aud] claim is equal to [ru.macaroon.login-with-apple].
1/21/2021 12:15:58 PM GMT Calculate the [c_hash] to ensure the integrity of the provided [code] value [c98f13298914940aeb56d177a62254320.0.mrtuw.pqCD8_66uaZdK8DLSoboZQ].
1/21/2021 12:15:58 PM GMT Generate the [client_secret] used to call the configured Token endpoint.
1/21/2021 12:15:58 PM GMT Call the configured Token endpoint [https://appleid.apple.com/auth/token] with the the following [client_secret] value: --JWT_LIKE_TOKEN_SKIPPED--
1/21/2021 12:15:58 PM GMT Endpoint returned status code [400]
1/21/2021 12:15:58 PM GMT The response was not successful, see the error event log.