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I have completed the tutorial, but when I login or register I am getting transition superseded error. Also because of this, the application is not able to fetch channels, gravatar, and online people. And after login when I reload the application then it works fine without any errors. I am using angular v1.6.1 and angular-ui-router v0.3.2.
I also pulled the latest code in branch 01 and still facing the same issue.

Below are the stack traces

• angular.js:14328 Error: transition superseded at $StateProvider.$get (http://localhost:4000/bower_components/angular-ui-router/release/angular-ui-router.js:2909:37) at Object.invoke (http://localhost:4000/bower_components/angular/angular.js:4842:19) at http://localhost:4000/bower_components/angular/angular.js:4636:37 at Object.getService [as get] (http://localhost:4000/bower_components/angular/angular.js:4783:32) at http://localhost:4000/bower_components/angular-ui-router/release/angular-ui-router.js:3696:17 at Object.invoke (http://localhost:4000/bower_components/angular/angular.js:4842:19) at http://localhost:4000/bower_components/angular/angular.js:4645:62 at forEach (http://localhost:4000/bower_components/angular/angular.js:357:20) at createInjector (http://localhost:4000/bower_components/angular/angular.js:4645:3) at doBootstrap (http://localhost:4000/bower_components/angular/angular.js:1838:20) Possibly unhandled rejection: {} (anonymous) @ angular.js:14328 (anonymous) @ angular.js:10837 processChecks @ angular.js:16674 $eval @ angular.js:17972 $digest @ angular.js:17786 (anonymous) @ angular.js:18011 completeOutstandingRequest @ angular.js:6111 (anonymous) @ angular.js:6390

• angular.js:14328 Error: [$interpolate:interr] Can't interpolate: {{ channelsCtrl.getGravatar(channelsCtrl.profile.$id) }} TypeError: Cannot read property 'emailHash' of undefined http://errors.angularjs.org/1.6.1/$interpolate/interr?p0=%7B%7B%20channelsC…&p1=TypeError%3A%20Cannot%20read%20property%20'emailHash'%20of%20undefined at angular.js:68 at Function.$interpolateMinErr.interr (angular.js:12487) at interpolationFn (angular.js:12800) at Object.attrInterpolatePreLinkFn (angular.js:10143) at angular.js:1291 at invokeLinkFn (angular.js:10252) at nodeLinkFn (angular.js:9618) at compositeLinkFn (angular.js:8881) at compositeLinkFn (angular.js:8884) at compositeLinkFn (angular.js:8884)

• TypeError: Cannot read property 'emailHash' of undefined at Object.getGravatar (users.service.js:15) at fn (eval at compile (angular.js:1), <anonymous>:4:356) at expressionInputWatch (angular.js:16157) at Scope.$digest (angular.js:17806) at angular.js:18011 at completeOutstandingRequest (angular.js:6111) at angular.js:6390