[keycloak-user] Unable to log in to master realm with new created users

Hello, I have an issue with a running Keycloak 1.2.0.Final instance. The instance was running all okay but suddenly without changing anything to the installation I am not able to create new users in the Master realm and log in with this new user. Allready existing users can login to Keycloak, also when I change the password for the user. As soon as I create a user (planon in this example) , and try to log in with the given credentials I get Invalid username or password prompted and see the line below in the server.log ^[[0m^[[33m08:44:37,204 WARN [org.keycloak.events] (default task-24) type=LOGIN_ERROR, realmId=master, clientId=security-admin-console, userId=2260992e-a2fb-4503-b5a1-f468526fbc9f, ipAddress=84.233.191.62, error=invalid_user_credentials, auth_method=form, response_type=code, redirect_uri=https://fr-authtest.planoncloud.com/auth/admin/master/console/, code_id=b2a5f41b-568c-420a-bd5d-770080c369ab, username=planon How can I find the rootcause for this issue ? (And a resolution) With kind regards / Met vriendelijke groet, Maurice Quaedackers Planon Cloud Center _____________________ Planon B.V. Postbus 38074 6503 AB Nijmegen Wijchenseweg 8 6537 TL Nijmegen Nederland T: +31 (0) 24 641 3135 F: +31 (0) 24 642 2942 E: maurice.quaedackers@planonsoftware.com<mailto:maurice.quaedackers@planonsoftware.com> W: www.planonsoftware.com<http://www.planonsoftware.com/> Deze email en alle bijlagen zijn slechts voor gebruik door de beoogde ontvanger. De email kan intellectueel eigendom en/of vertrouwelijke informatie bevatten. Het mag niet worden gekopieerd, openbaar gemaakt, bewaard of gebruikt worden door anderen dan waarvoor deze bestemd is. Bent u niet de beoogde ontvanger,verwijdert u dan deze email met alle bijlagen en kopieën onmiddellijk en informeer de afzender. This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender.