I am not sure if that was a typo on your side. But, if you are actually using Safari 3.1.2, then we cannot guarantee any stability or consistency with the freeCodeCamp platform, and suggest you upgrade to the latest stable version of the browser. Ideally, we suggest you use the latest stable release of Chrome for the fCC curriculum.
Safari appears to get 403 errors when calling api.freecodecamp.org that Chrome doesn’t.
[Error] Failed to load resource: the server responded with a status of 403 () (update-my-current-challenge, line 0)
[Error] Failed to load resource: the server responded with a status of 403 () (modern-challenge-completed, line 0)