I manually created a 3.1.0 client using these instructions: https://gluu.org/docs/ce/3.1.0/integration/webapps/openidc-rp/ I have mod_auth_oidc installed in my Apache and I previously used it to authenticate with Gluu 3.0.2. I changed the ssl.conf file to use the new OIDCClientID (but made no other changes) and restarted httpd. I have response types set to "code" in my Gluu client config. Getting {"error":"unsupported_response_type","error_description":"The authorization server does not support obtaining an access token using this method.","state":"gA6W2wjqSF45ca3tmQ03ibVk7fk"} In response to the Apache mod sending: https://<gluu server>/oxauth/restv1/authorize?response_type=code&scope=openid%20profile%20email&client_id=%40%21A056.B4BD.E288.2069%210001%215D72.9619%210008%2164DC.B8A1.C57F.A95E&state=gA6W2wjqSF45ca3tmQ03ibVk7fk&redirect_uri=https%3A%2F%2Fclient2.example.com%2Fa%2Fcallback&nonce=jr9pQcTPXe1US7itwMRcu03QfgY1jeu342EDxDhGuW8 jetty/oxauth/logs and jetty/identity/logs don't show anything but connectionProvider logs every minute Thanks for any help debugging.