Hello, I'm trying to update a keycloak Client using the client-registrations endpoint as described here: http://keycloak.github.io/docs/userguide/keycloak-server/html/client-regi... All seems fine and client creation as retrieval work but *update* keeps failing. Here is what i do: 1. Create a new bearer-only Client with ClientID -> newclient 2. I 'Regenerate registration access token' here is what i get: eyJhbGciOiJSUzI1NiJ9.eyJqdGkiOiI0MGM1ZWIyNy1mYTNmLTRiNjktYjlmZC01NTIyYWM2NzYxZDkiLCJleHAiOjAsIm5iZiI6MCwiaWF0IjoxNDY2NTExNzEyLCJpc3MiOiJodHRwOi8vMTI3LjAuMC4xOjgwODEvYXV0aC9yZWFsbXMvcmVzdGNvbW0tdGVzdCIsImF1ZCI6Imh0dHA6Ly8xMjcuMC4wLjE6ODA4MS9hdXRoL3JlYWxtcy9yZXN0Y29tbS10ZXN0IiwidHlwIjoiUmVnaXN0cmF0aW9uQWNjZXNzVG9rZW4ifQ.bI2JQLOAwWdxgtaNgAXw8aliWRJRs7RviNJRPHPHyVFI6AfuBsEpZ9c5e_v6vFD0hWoNjneUnDmS-CUrzPKcBWrITXkrUwxwEQAJpQD-ONWim6AiVVOxr3sizgwxRyBX__Cny8IMm8BWjUIIIkRviSc9QE7tYscTRTE4AP5ZRlsmB7hsmfkRSgzmd5SF2ZQWj8DriSou_-ivzZ9wnlwENoewePOK1b6oZhhGQiGo4SM0pLkTWGkN8kuO3aYei6OKiol2eJn9B4bA7wr6uUruEAg03symAaDFWscpmHIl27sxF3XkYdn8F-vJwNdhFJx_t84IEKucwZEwdgNFuWZuIQ 3. I make the update request to: http://127.0.0.1:8081/auth/realms/restcomm-test/clients-registrations/def... here is the curl command: curl -i -X PUT \ eyJhbGciOiJSUzI1NiJ9.eyJqdGkiOiJhNDc3NzA3Yi1hOGM4LTRjMGItYjExYi0xZWE4ZTgyNTNkYTgiLCJleHAiOjAsIm5iZiI6MCwiaWF0IjoxNDY2NTEyMDc4LCJpc3MiOiJodHRwOi8vMTI3LjAuMC4xOjgwODEvYXV0aC9yZWFsbXMvcmVzdGNvbW0tdGVzdCIsImF1ZCI6Imh0dHA6Ly8xMjcuMC4wLjE6ODA4MS9hdXRoL3JlYWxtcy9yZXN0Y29tbS10ZXN0IiwidHlwIjoiUmVnaXN0cmF0aW9uQWNjZXNzVG9rZW4ifQ.G33SBIhvFay8YAMkGxeyWMDSfeM9slS7pv49hWNxmmvaNUmUOFhP8e2-WcQJW2NZEumOKSm-UGk-2VH5EiB24F8DWn9hGVOlJdIysewbyei94Xqcu-xoOAhSRdcU3xOEEKrVBQxTAQRWahp5Jil1A_jHoY1bLcQk1Keu1WAOKDBgUyGu2pO7sfs1hjUHQ2V_pC9xOeC7rf3rpdXF7OAb9Xf8pD1_xfuUwMSGJzey0Mqs3dp9qS_v4g6CaOQvcMOVgf0_cb0RKkeSyqgxcTO0Laxrz7NNP4I9ZojLQE_8bEyPQyrREfWZj8zQp4hLO89k_O_xzv3iOYOj064xiEX6nA" \ http://127.0.0.1:8081/auth/realms/restcomm-test/clients-registrations/def... ' 4. I get a 500 Internal Server error response with the following error in the logs: RESTEASY002005: Failed executing PUT /realms/restcomm-test/clients-registrations/default/newclient: org.jboss.resteasy.core.NoMessageBodyWriterFoundFailure: Could not find MessageBodyWriter for response object of type: org.keycloak.representations.idm.ClientRepresentation of media type: application/octet-stream 5. If i run again i get a 401 so it seems that authorization passes the first time but something breaks afterwards. Next time, the one-time token is already consumed so i get a 401. Ok, that makes sense. As you may have noticed i'm using a pretty reduced version of the ClientRepresentation but i've also experienced with others that are more or less complete and also by sending the *exact json response as returned when retrieving the client*. Same result :-( Also, the rest of the HTTP methods (POST on /default,DELETE, GET) work fine with the registration access token. So it seems that either i'm sending crap or sth else happens. Any ideas what may be wrong? Thanks