[keycloak-user] Invalid code error

Hi, I'm trying to integrate Grafana and Keycloak. I'm getting following error when trying to authenticate against Keycloak. type=LOGIN_ERROR, realmId=master, clientId=null, userId=null, ipAddress=10.80.10.25, error=invalid_code Any idea what could be wrong, or what the error message is indicating? Thanks, Ondrej