Keycloak new realm and wso2 api manager integration generate token issue

19:09:51,583 WARN [org.keycloak.services.util.MtlsHoKTokenUtil] (default task-26) no client certificate available.
19:09:51,585 WARN [org.keycloak.events] (default task-26) type=CLIENT_LOGIN_ERROR, realmId=demoRealm, clientId=demoClient, userId=801e3799-307f-4840-bd6c-99de2f92e318, ipAddress=127.0.0.1, error=invalid_request, grant_type=client_credentials, client_auth_method=client-secret, username=service-account-democlient, authSessionParentId=79eae56c-4943-4486-83d5-c0d66d1c6649, authSessionTabId=rGClGczYKA4
19:09:51,599 WARN [org.keycloak.events] (default task-26) type=CLIENT_REGISTER_ERROR, realmId=demoRealm, clientId=null, userId=null, ipAddress=127.0.0.1, error=invalid_token, reason=‘Failed decode token’