If you can't login to study goal on iOS and others can, try the following:


1) Make sure iOS is up-to-date.  We have instances where login wouldn't work until the latest updates had been applied.


2) Try clearing the Safari cache: 

  1. Go to the Settings and tap on Safari.
  2. Scroll down to the bottom and press Advanced.
  3. Tap on the option that says 'Website Data'.
  4. See how much space it is taking up and press 'Remove All Website Data'