There are a few issues on Github that would explain this. It seems that they tried migrating to FireBase and are ironing out some things still. https://github.

There are a few issues on Github that would explain this. It seems that they tried migrating to FireBase and are ironing out some things still. https://github.com/angular/angular.js/issues/16432 https://github.com/angular/angular.js/issues/16432 https://github.com/angular/angular.js/issues/16447 https://github.com/angular/angular.js/issues/16447