You cannot get the error_description, because your object "error" does not exist. Take a look at the examples[1], it may give you an idea. [1] - https://github.com/keycloak/keycloak/blob/master/examples/ js-console/src/main/webapp/index.html#L139-L143 On 2017-05-06, Mehdi Sheikhalishahi wrote: > Hi, > > With the following code, I am not able to get error message. How should I > do that? thanks. > > Uncaught TypeError: Cannot read property 'error_description' of undefined > at Object.errorCallback (index.js:49) > at Object.setError (keycloak.js:775) > at Object.errorCallback (keycloak.js:198) > at Object.setError (keycloak.js:775) > at XMLHttpRequest.req.onreadystatechange (keycloak.js:600) > > return kc.init({onLoad: 'login-required'}).success(authenticated => { > console.log("AUTH STATUS: " + authenticated); > if(!authenticated) { > kc.login(); > } else { > dispatch(loginSucceed(kc)); > }}).error(function(error) { > console.log(error.error_description); > console.log(error.error); > console.log(JSON.stringify(error)); > dispatch(loginFailed(JSON.stringify(error))); > }); > _______________________________________________ > keycloak-user mailing list > keycloak-user(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/keycloak-user -- abstractj