How to fix "Temporary UI State" error in React Tutorial?

I see some packages update. I try to do react tutorial in this Meteor version (1.5.1)
There is an error on “Temporary UI State” (TypeError) about Collection.
So How to fix “Temporary UI State” error in React Tutorial?
Sorry if my question seems odd because I’m very new to Meteor.

I found that when I remove all projects by “rm -rf *”, it makes error for new project I created.
Today I try to test the todo tutorial with new Meteor installation (1.5.1) and all package update (especially mongo 1.1.22).
There is no error anymore. ,Meteor is so great !!!