Uncaught TypeError

Starting any lesson, the “GOT IT” and “GO BACK” buttons throw a console Uncaught TypeError: _.chain is not a function error.skills__contents_controller-e5b9d330c670a3c58d829f919b922ec3.js:1
this does not let me to go through any lesson. do not know it is my connection problem a bug by website.

Hey Saide,

Would you mind posting a link to an exercise where you’re seeing this behavior?