Meteor Simple-Todos Example by meteor's official site

When I run Meteor Sites Simple-Todos after including collection First data was not showing in browser and now an error “Your application is crashing” showing on the console.How to resolve these issues?

Look at the browser console to see what kind of error messages are you getting, and then check the server run time log for any error messages.

When posting to the forms, it’s always good to include as much information as possible so others can help you out. “You application is crushing” is a generic error message and tell us nothing about your problem.